##############################################################################
#                                                                            #
# This CIF contains the data in a paper accepted for publication in          #
# Acta Crystallographica Section C. It conforms to the requirements of       #
# Notes for Authors for Acta Crystallographica Section C, and has been       #
# peer reviewed under the auspices of the IUCr Commission on Journals.       #
#                                                                            #
# Full details of the Crystallographic Information File format               #
# are given in the paper "The Crystallographic Information File (CIF):       #
# a New Standard Archive File for Crystallography" by S. R. Hall, F. H.      #
# Allen and I. D. Brown [Acta Cryst. (1991), A47, 655-685].                  #
#                                                                            #
# The current version of the core CIF dictionary is obtainable from          #
# ftp://ftp.iucr.org/pub/cif_core.dic.                                       #
#                                                                            #
# Software is freely available for graphical display of the structure(s)     #
# in this CIF. For information consult the CIF software page                 #
# http://www.iucr.org/resources/cif/software.                                #
#                                                                            #
# This file may be used for bona fide research purposes within the           #
# scientific community so long as proper attribution is given to the journal # 
# article from which it was obtained.                                        #
#                                                                            #
##############################################################################
data_3
_database_code_depnum_ccdc_archive 'CCDC 1897282'
_audit_creation_method     'SHELXL-2018/3'
_chemical_name_systematic
;
Di-tert-butyl 2,2'-[diselane-1,2-diylbis(2,1-phenylene)]dicarbamate
;
_chemical_name_common     ?
_chemical_formula_moiety     'C22 H28 N2 O4 Se2'
_chemical_formula_sum     'C22 H28 N2 O4 Se2'
_chemical_formula_iupac     'C22 H28 N2 O4 Se2'
_chemical_formula_weight     542.38
_chemical_melting_point     ?
_space_group_crystal_system     monoclinic
_space_group_name_H-M_alt     'C 2/c'
_space_group_name_Hall     '-C 2yc'
loop_
    _space_group_symop_operation_xyz
    'x, y, z'
    '-x, y, -z+1/2'
    'x+1/2, y+1/2, z'
    '-x+1/2, y+1/2, -z+1/2'
    '-x, -y, -z'
    'x, -y, z-1/2'
    '-x+1/2, -y+1/2, -z'
    'x+1/2, -y+1/2, z-1/2'
_cell_length_a     18.1780(7)
_cell_length_b     9.3386(5)
_cell_length_c     28.9009(18)
_cell_angle_alpha     90
_cell_angle_beta     99.440(5)
_cell_angle_gamma     90
_cell_volume     4839.7(4)
_cell_formula_units_Z     8
_cell_measurement_reflns_used     9904
_cell_measurement_theta_min     2.4620
_cell_measurement_theta_max     29.6780
_cell_measurement_temperature     100(2)
_exptl_crystal_description     prism
_exptl_crystal_colour     'colourless'
_exptl_crystal_size_max     0.158
_exptl_crystal_size_mid     0.095
_exptl_crystal_size_min     0.086
_exptl_crystal_density_diffrn     1.489
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     ?
_exptl_crystal_F_000     2192
_exptl_absorpt_coefficient_mu     3.084
_exptl_absorpt_correction_type     multi-scan
_exptl_absorpt_process_details
;
(CrysAlis PRO; Rigaku OD, 2015)'
;
_exptl_absorpt_correction_T_min     0.75418
_exptl_absorpt_correction_T_max     1.00000
_diffrn_ambient_temperature     100(2)
_diffrn_source     'fine-focus sealed X-ray tube'
_diffrn_radiation_type     MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_measurement_device_type     'Rigaku CCD dual source'
_diffrn_measurement_method     'ω scans'
_diffrn_detector_area_resol_mean     ?
_diffrn_reflns_number     37302
_diffrn_reflns_av_R_equivalents     0.0790
_diffrn_reflns_av_unetI/netI     0.0488
_diffrn_reflns_theta_min     2.459
_diffrn_reflns_theta_max     27.877
_diffrn_reflns_theta_full     25.242
_diffrn_measured_fraction_theta_max     1.000
_diffrn_measured_fraction_theta_full     1.000
_diffrn_reflns_limit_h_min     -23
_diffrn_reflns_limit_h_max     23
_diffrn_reflns_limit_k_min     -12
_diffrn_reflns_limit_k_max     12
_diffrn_reflns_limit_l_min     -38
_diffrn_reflns_limit_l_max     36
_refine_special_details     ?
_reflns_number_total     5769
_reflns_number_gt     4483
_reflns_threshold_expression     'I > 2σ(I)'
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all     0.0761
_refine_ls_R_factor_gt     0.0535
_refine_ls_wR_factor_gt     0.0997
_refine_ls_wR_factor_ref     0.1071
_refine_ls_goodness_of_fit_ref     1.128
_refine_ls_restrained_S_all     1.128
_refine_ls_number_reflns     5769
_refine_ls_number_parameters     285
_refine_ls_number_restraints     0
_refine_ls_hydrogen_treatment     mixed
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
             'w=1/[σ²(Fo²)+(0.0295P)²+17.3868P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_hydrogens     mixed
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary     ?
_refine_ls_shift/su_max     0.001
_refine_ls_shift/su_mean     0.000
_refine_diff_density_max     0.847
_refine_diff_density_min     -0.671
_refine_ls_extinction_method     none
_refine_ls_extinction_coef     .
loop_
    _atom_type_symbol
    _atom_type_description
    _atom_type_scat_dispersion_real
    _atom_type_scat_dispersion_imag
    _atom_type_scat_source
    'C' 'C' 0.0033 0.0016
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'H' 'H' 0.0000 0.0000
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'N' 'N' 0.0061 0.0033
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'O' 'O' 0.0106 0.0060
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'Se' 'Se' -0.0929 2.2259
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
_computing_data_collection
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_cell_refinement
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_data_reduction
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_structure_solution
;
SHELXT (Sheldrick, 2015a)
;
_computing_structure_refinement
;
SHELXL2018 (Sheldrick, 2015b)
;
_computing_molecular_graphics
;
SHELXTL (Sheldrick, 2008)
;
_computing_publication_material
;
SHELXTL (Sheldrick, 2008)
;
loop_
    _atom_site_type_symbol
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    _atom_site_adp_type
    _atom_site_calc_flag
    _atom_site_occupancy
    _atom_site_disorder_assembly
    _atom_site_disorder_group
    Se Se1 0.86339(2) 0.28216(4) 0.49219(2) 0.02931(11) Uani d 1 . .
    Se Se2 0.86311(2) 0.52389(4) 0.51358(2) 0.03443(12) Uani d 1 . .
    N N1 0.74970(17) 0.2863(4) 0.39781(13) 0.0306(7) Uani d 1 . .
    H H1N 0.746(2) 0.290(4) 0.4251(15) 0.031(12) Uiso d 1 . .
    O O2 0.68533(16) 0.2820(4) 0.32374(11) 0.0510(9) Uani d 1 . .
    O O3 0.62763(14) 0.2820(4) 0.38685(10) 0.0410(7) Uani d 1 . .
    N N2 0.74455(19) 0.6127(4) 0.42843(12) 0.0293(7) Uani d 1 . .
    H H2N 0.787(2) 0.592(5) 0.4328(15) 0.035(13) Uiso d 1 . .
    O O5 0.65091(15) 0.7150(4) 0.37732(11) 0.0467(8) Uani d 1 . .
    O O6 0.76644(14) 0.6826(3) 0.36002(9) 0.0346(7) Uani d 1 . .
    C C1 0.8811(2) 0.2945(4) 0.42882(14) 0.0276(8) Uani d 1 . .
    C C2 0.9546(2) 0.2980(5) 0.42168(16) 0.0380(10) Uani d 1 . .
    H H2A 0.993426 0.300576 0.448064 0.046 Uiso calc 1 . .
    C C3 0.9728(2) 0.2978(5) 0.37751(17) 0.0451(11) Uani d 1 . .
    H H3A 1.023413 0.299498 0.373123 0.054 Uiso calc 1 . .
    C C4 0.9161(2) 0.2950(5) 0.33972(17) 0.0466(11) Uani d 1 . .
    H H4A 0.928125 0.295193 0.308944 0.056 Uiso calc 1 . .
    C C5 0.8425(2) 0.2918(5) 0.34533(15) 0.0381(10) Uani d 1 . .
    H H5A 0.804348 0.289842 0.318596 0.046 Uiso calc 1 . .
    C C6 0.8238(2) 0.2915(4) 0.39029(14) 0.0293(8) Uani d 1 . .
    C C7 0.6869(2) 0.2829(4) 0.36527(15) 0.0309(9) Uani d 1 . .
    C C8 0.5517(2) 0.2720(5) 0.35906(14) 0.0372(10) Uani d 1 . .
    C C9 0.5444(3) 0.1363(6) 0.3312(2) 0.0604(15) Uani d 1 . .
    H H9A 0.561861 0.055707 0.351834 0.091 Uiso calc 1 . .
    H H9B 0.574485 0.143015 0.306137 0.091 Uiso calc 1 . .
    H H9C 0.491961 0.121370 0.317512 0.091 Uiso calc 1 . .
    C C10 0.5039(2) 0.2680(8) 0.39657(18) 0.075(2) Uani d 1 . .
    H H10A 0.515967 0.182433 0.415966 0.113 Uiso calc 1 . .
    H H10B 0.451279 0.265243 0.382103 0.113 Uiso calc 1 . .
    H H10C 0.513294 0.353716 0.416221 0.113 Uiso calc 1 . .
    C C11 0.5361(3) 0.4024(6) 0.3290(2) 0.0595(15) Uani d 1 . .
    H H11A 0.549311 0.488165 0.348096 0.089 Uiso calc 1 . .
    H H11B 0.482952 0.405413 0.315638 0.089 Uiso calc 1 . .
    H H11C 0.565753 0.398961 0.303626 0.089 Uiso calc 1 . .
    C C12 0.7578(2) 0.5542(4) 0.51048(14) 0.0302(9) Uani d 1 . .
    C C13 0.7281(3) 0.5382(4) 0.55114(14) 0.0360(10) Uani d 1 . .
    H H13A 0.759977 0.513769 0.579473 0.043 Uiso calc 1 . .
    C C14 0.6534(3) 0.5570(4) 0.55131(15) 0.0383(10) Uani d 1 . .
    H H14A 0.633408 0.545968 0.579479 0.046 Uiso calc 1 . .
    C C15 0.6077(2) 0.5921(4) 0.50989(16) 0.0382(10) Uani d 1 . .
    H H15A 0.555700 0.604075 0.509593 0.046 Uiso calc 1 . .
    C C16 0.6364(2) 0.6102(4) 0.46876(15) 0.0323(9) Uani d 1 . .
    H H16A 0.604120 0.634318 0.440563 0.039 Uiso calc 1 . .
    C C17 0.7124(2) 0.5931(4) 0.46861(14) 0.0290(9) Uani d 1 . .
    C C18 0.7138(2) 0.6745(4) 0.38731(14) 0.0295(8) Uani d 1 . .
    C C19 0.7477(2) 0.7340(5) 0.31132(14) 0.0355(10) Uani d 1 . .
    C C20 0.8205(3) 0.7129(6) 0.29334(16) 0.0550(14) Uani d 1 . .
    H H20A 0.835116 0.611875 0.296517 0.083 Uiso calc 1 . .
    H H20B 0.859253 0.772179 0.311612 0.083 Uiso calc 1 . .
    H H20C 0.814250 0.740755 0.260242 0.083 Uiso calc 1 . .
    C C21 0.7267(3) 0.8899(5) 0.31093(19) 0.0631(15) Uani d 1 . .
    H H21A 0.765875 0.943841 0.330904 0.095 Uiso calc 1 . .
    H H21B 0.679515 0.900699 0.322864 0.095 Uiso calc 1 . .
    H H21C 0.720857 0.926599 0.278774 0.095 Uiso calc 1 . .
    C C22 0.6876(3) 0.6411(6) 0.28424(16) 0.0532(13) Uani d 1 . .
    H H22A 0.700412 0.540007 0.289997 0.080 Uiso calc 1 . .
    H H22B 0.683372 0.661512 0.250650 0.080 Uiso calc 1 . .
    H H22C 0.639848 0.661397 0.294502 0.080 Uiso calc 1 . .
_geom_special_details
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;
loop_
    _geom_bond_atom_site_label_1
    _geom_bond_atom_site_label_2
    _geom_bond_site_symmetry_2
    _geom_bond_distance
    _geom_bond_publ_flag
    Se1 C1 . 1.914(4) ?
    Se1 Se2 . 2.3408(6) ?
    Se2 C12 . 1.923(4) ?
    N1 C7 . 1.356(5) ?
    N1 C6 . 1.399(5) ?
    N1 H1N . 0.80(4) ?
    O2 C7 . 1.196(5) ?
    O3 C7 . 1.330(5) ?
    O3 C8 . 1.482(4) ?
    N2 C18 . 1.356(5) ?
    N2 C17 . 1.395(5) ?
    N2 H2N . 0.79(4) ?
    O5 C18 . 1.194(5) ?
    O6 C18 . 1.338(4) ?
    O6 C19 . 1.473(5) ?
    C1 C2 . 1.386(5) ?
    C1 C6 . 1.395(5) ?
    C2 C3 . 1.370(6) ?
    C2 H2A . 0.9500 ?
    C3 C4 . 1.373(6) ?
    C3 H3A . 0.9500 ?
    C4 C5 . 1.375(6) ?
    C4 H4A . 0.9500 ?
    C5 C6 . 1.396(6) ?
    C5 H5A . 0.9500 ?
    C8 C9 . 1.495(7) ?
    C8 C11 . 1.495(6) ?
    C8 C10 . 1.496(6) ?
    C9 H9A . 0.9800 ?
    C9 H9B . 0.9800 ?
    C9 H9C . 0.9800 ?
    C10 H10A . 0.9800 ?
    C10 H10B . 0.9800 ?
    C10 H10C . 0.9800 ?
    C11 H11A . 0.9800 ?
    C11 H11B . 0.9800 ?
    C11 H11C . 0.9800 ?
    C12 C13 . 1.379(6) ?
    C12 C17 . 1.396(6) ?
    C13 C14 . 1.370(6) ?
    C13 H13A . 0.9500 ?
    C14 C15 . 1.380(6) ?
    C14 H14A . 0.9500 ?
    C15 C16 . 1.385(6) ?
    C15 H15A . 0.9500 ?
    C16 C17 . 1.392(5) ?
    C16 H16A . 0.9500 ?
    C19 C21 . 1.504(6) ?
    C19 C22 . 1.511(6) ?
    C19 C20 . 1.511(6) ?
    C20 H20A . 0.9800 ?
    C20 H20B . 0.9800 ?
    C20 H20C . 0.9800 ?
    C21 H21A . 0.9800 ?
    C21 H21B . 0.9800 ?
    C21 H21C . 0.9800 ?
    C22 H22A . 0.9800 ?
    C22 H22B . 0.9800 ?
    C22 H22C . 0.9800 ?
loop_
    _geom_angle_atom_site_label_1
    _geom_angle_atom_site_label_2
    _geom_angle_atom_site_label_3
    _geom_angle_site_symmetry_1
    _geom_angle_site_symmetry_3
    _geom_angle
    _geom_angle_publ_flag
    C1 Se1 Se2 . . 101.68(11) ?
    C12 Se2 Se1 . . 100.07(11) ?
    C7 N1 C6 . . 128.0(4) ?
    C7 N1 H1N . . 120(3) ?
    C6 N1 H1N . . 112(3) ?
    C7 O3 C8 . . 120.0(3) ?
    C18 N2 C17 . . 128.1(3) ?
    C18 N2 H2N . . 120(3) ?
    C17 N2 H2N . . 112(3) ?
    C18 O6 C19 . . 120.4(3) ?
    C2 C1 C6 . . 119.6(4) ?
    C2 C1 Se1 . . 117.5(3) ?
    C6 C1 Se1 . . 122.8(3) ?
    C3 C2 C1 . . 121.6(4) ?
    C3 C2 H2A . . 119.2 ?
    C1 C2 H2A . . 119.2 ?
    C2 C3 C4 . . 118.6(4) ?
    C2 C3 H3A . . 120.7 ?
    C4 C3 H3A . . 120.7 ?
    C3 C4 C5 . . 121.6(4) ?
    C3 C4 H4A . . 119.2 ?
    C5 C4 H4A . . 119.2 ?
    C4 C5 C6 . . 120.0(4) ?
    C4 C5 H5A . . 120.0 ?
    C6 C5 H5A . . 120.0 ?
    C1 C6 C5 . . 118.6(3) ?
    C1 C6 N1 . . 119.3(4) ?
    C5 C6 N1 . . 122.2(4) ?
    O2 C7 O3 . . 125.7(4) ?
    O2 C7 N1 . . 125.1(4) ?
    O3 C7 N1 . . 109.2(3) ?
    O3 C8 C9 . . 109.7(4) ?
    O3 C8 C11 . . 109.5(4) ?
    C9 C8 C11 . . 112.7(4) ?
    O3 C8 C10 . . 102.0(3) ?
    C9 C8 C10 . . 111.0(5) ?
    C11 C8 C10 . . 111.4(4) ?
    C8 C9 H9A . . 109.5 ?
    C8 C9 H9B . . 109.5 ?
    H9A C9 H9B . . 109.5 ?
    C8 C9 H9C . . 109.5 ?
    H9A C9 H9C . . 109.5 ?
    H9B C9 H9C . . 109.5 ?
    C8 C10 H10A . . 109.5 ?
    C8 C10 H10B . . 109.5 ?
    H10A C10 H10B . . 109.5 ?
    C8 C10 H10C . . 109.5 ?
    H10A C10 H10C . . 109.5 ?
    H10B C10 H10C . . 109.5 ?
    C8 C11 H11A . . 109.5 ?
    C8 C11 H11B . . 109.5 ?
    H11A C11 H11B . . 109.5 ?
    C8 C11 H11C . . 109.5 ?
    H11A C11 H11C . . 109.5 ?
    H11B C11 H11C . . 109.5 ?
    C13 C12 C17 . . 120.6(4) ?
    C13 C12 Se2 . . 118.0(3) ?
    C17 C12 Se2 . . 121.4(3) ?
    C14 C13 C12 . . 121.0(4) ?
    C14 C13 H13A . . 119.5 ?
    C12 C13 H13A . . 119.5 ?
    C13 C14 C15 . . 118.9(4) ?
    C13 C14 H14A . . 120.5 ?
    C15 C14 H14A . . 120.5 ?
    C14 C15 C16 . . 121.0(4) ?
    C14 C15 H15A . . 119.5 ?
    C16 C15 H15A . . 119.5 ?
    C15 C16 C17 . . 120.2(4) ?
    C15 C16 H16A . . 119.9 ?
    C17 C16 H16A . . 119.9 ?
    C16 C17 N2 . . 122.6(4) ?
    C16 C17 C12 . . 118.2(4) ?
    N2 C17 C12 . . 119.2(4) ?
    O5 C18 O6 . . 126.1(4) ?
    O5 C18 N2 . . 125.9(4) ?
    O6 C18 N2 . . 108.0(3) ?
    O6 C19 C21 . . 110.0(4) ?
    O6 C19 C22 . . 110.0(3) ?
    C21 C19 C22 . . 113.0(4) ?
    O6 C19 C20 . . 102.0(3) ?
    C21 C19 C20 . . 111.1(4) ?
    C22 C19 C20 . . 110.3(4) ?
    C19 C20 H20A . . 109.5 ?
    C19 C20 H20B . . 109.5 ?
    H20A C20 H20B . . 109.5 ?
    C19 C20 H20C . . 109.5 ?
    H20A C20 H20C . . 109.5 ?
    H20B C20 H20C . . 109.5 ?
    C19 C21 H21A . . 109.5 ?
    C19 C21 H21B . . 109.5 ?
    H21A C21 H21B . . 109.5 ?
    C19 C21 H21C . . 109.5 ?
    H21A C21 H21C . . 109.5 ?
    H21B C21 H21C . . 109.5 ?
    C19 C22 H22A . . 109.5 ?
    C19 C22 H22B . . 109.5 ?
    H22A C22 H22B . . 109.5 ?
    C19 C22 H22C . . 109.5 ?
    H22A C22 H22C . . 109.5 ?
    H22B C22 H22C . . 109.5 ?
loop_
    _geom_torsion_atom_site_label_1
    _geom_torsion_atom_site_label_2
    _geom_torsion_atom_site_label_3
    _geom_torsion_atom_site_label_4
    _geom_torsion_site_symmetry_1
    _geom_torsion_site_symmetry_2
    _geom_torsion_site_symmetry_3
    _geom_torsion_site_symmetry_4
    _geom_torsion
    _geom_torsion_publ_flag
    C6 C1 C2 C3 . . . . -0.3(6) ?
    Se1 C1 C2 C3 . . . . 175.9(3) ?
    C1 C2 C3 C4 . . . . 0.4(7) ?
    C2 C3 C4 C5 . . . . -0.3(8) ?
    C3 C4 C5 C6 . . . . 0.0(7) ?
    C2 C1 C6 C5 . . . . 0.1(6) ?
    Se1 C1 C6 C5 . . . . -175.9(3) ?
    C2 C1 C6 N1 . . . . 179.3(4) ?
    Se1 C1 C6 N1 . . . . 3.3(5) ?
    C4 C5 C6 C1 . . . . 0.1(6) ?
    C4 C5 C6 N1 . . . . -179.1(4) ?
    C7 N1 C6 C1 . . . . 179.9(4) ?
    C7 N1 C6 C5 . . . . -0.9(7) ?
    C8 O3 C7 O2 . . . . 3.3(7) ?
    C8 O3 C7 N1 . . . . -177.3(4) ?
    C6 N1 C7 O2 . . . . 0.9(7) ?
    C6 N1 C7 O3 . . . . -178.5(4) ?
    C7 O3 C8 C9 . . . . 59.9(5) ?
    C7 O3 C8 C11 . . . . -64.3(5) ?
    C7 O3 C8 C10 . . . . 177.6(4) ?
    C17 C12 C13 C14 . . . . 1.4(6) ?
    Se2 C12 C13 C14 . . . . -179.4(3) ?
    C12 C13 C14 C15 . . . . 0.2(6) ?
    C13 C14 C15 C16 . . . . -0.8(6) ?
    C14 C15 C16 C17 . . . . 0.0(6) ?
    C15 C16 C17 N2 . . . . -178.7(4) ?
    C15 C16 C17 C12 . . . . 1.5(5) ?
    C18 N2 C17 C16 . . . . 13.4(6) ?
    C18 N2 C17 C12 . . . . -166.9(4) ?
    C13 C12 C17 C16 . . . . -2.2(5) ?
    Se2 C12 C17 C16 . . . . 178.6(3) ?
    C13 C12 C17 N2 . . . . 178.0(3) ?
    Se2 C12 C17 N2 . . . . -1.2(5) ?
    C19 O6 C18 O5 . . . . -5.4(6) ?
    C19 O6 C18 N2 . . . . 174.8(3) ?
    C17 N2 C18 O5 . . . . -5.4(7) ?
    C17 N2 C18 O6 . . . . 174.4(4) ?
    C18 O6 C19 C21 . . . . 66.8(5) ?
    C18 O6 C19 C22 . . . . -58.3(5) ?
    C18 O6 C19 C20 . . . . -175.3(4) ?
loop_
    _geom_hbond_atom_site_label_D
    _geom_hbond_atom_site_label_H
    _geom_hbond_atom_site_label_A
    _geom_hbond_site_symmetry_A
    _geom_hbond_distance_DH
    _geom_hbond_distance_HA
    _geom_hbond_distance_DA
    _geom_hbond_angle_DHA
    _geom_hbond_publ_flag
    N1 H1N Se1 . 0.80(4) 2.63(4) 3.141(3) 123(4) yes
    N2 H2N Se2 . 0.79(4) 2.59(4) 3.106(3) 125(4) yes
    C2 H2A Se2 5_766 0.95 3.13 3.900(4) 139.8 yes
    C5 H5A O2 . 0.95 2.19 2.824(5) 122.8 yes
    C9 H9B O2 . 0.98 2.38 2.941(6) 115.6 yes
    C10 H10A Se1 7_656 0.98 3.17 3.719(5) 116.9 yes
    C11 H11C O2 . 0.98 2.42 2.964(6) 114.7 yes
    C16 H16A O5 . 0.95 2.27 2.871(5) 120.6 yes
    C20 H20C O2 4_655 0.98 2.46 3.429(6) 170.7 yes
    C21 H21B O5 . 0.98 2.45 3.019(6) 116.2 yes
    C22 H22A O2 . 0.98 2.63 3.544(7) 155.3 yes
    C22 H22C O5 . 0.98 2.42 2.957(6) 113.9 yes
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_shelx_estimated_absorpt_T_min     ?
_shelx_estimated_absorpt_T_max     ?
data_4
_database_code_depnum_ccdc_archive 'CCDC 1897283'
_audit_creation_method     'SHELXL-2018/3'
_chemical_name_systematic
;\
10,27-Di-tert-butyl 11,28-dioxo-2,3,19,20-tetraselena-10,12,27,29-\
tetraazapentacyclo[28.4.0.0^4,9^.0^13,18^.0^21,26^]tetratriaconta-\
1(30),4(9),5,7,13,15,17,21,23,25,31,33-dodecaene-10,27-dicarboxylate
;
_chemical_name_common     ?
_chemical_formula_moiety     'C36 H34 N4 O6 Se4'
_chemical_formula_sum     'C36 H34 N4 O6 Se4'
_chemical_formula_iupac     'C36 H34 N4 O6 Se4'
_chemical_formula_weight     934.51
_chemical_melting_point     ?
_space_group_crystal_system     triclinic
_space_group_name_H-M_alt     'P -1'
_space_group_name_Hall     '-P 1'
loop_
    _space_group_symop_operation_xyz
    'x, y, z'
    '-x, -y, -z'
_cell_length_a     9.4865(3)
_cell_length_b     9.7410(2)
_cell_length_c     11.2789(3)
_cell_angle_alpha     101.000(2)
_cell_angle_beta     108.394(2)
_cell_angle_gamma     105.264(2)
_cell_volume     910.42(4)
_cell_formula_units_Z     1
_cell_measurement_reflns_used     15479
_cell_measurement_theta_min     2.3910
_cell_measurement_theta_max     31.2870
_cell_measurement_temperature     100(2)
_exptl_crystal_description     needle
_exptl_crystal_colour     'clear intense orange'
_exptl_crystal_size_max     0.172
_exptl_crystal_size_mid     0.156
_exptl_crystal_size_min     0.109
_exptl_crystal_density_diffrn     1.704
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     ?
_exptl_crystal_F_000     462
_exptl_absorpt_coefficient_mu     4.080
_exptl_absorpt_correction_type     multi-scan
_exptl_absorpt_process_details
;
(CrysAlis PRO; Rigaku OD, 2015)
;
_exptl_absorpt_correction_T_min     0.82321
_exptl_absorpt_correction_T_max     1.00000
_diffrn_ambient_temperature     100(2)
_diffrn_source     'fine-focus sealed X-ray tube'
_diffrn_radiation_type     MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_measurement_device_type     'Rigaku CCD dual source'
_diffrn_measurement_method     'ω scans'
_diffrn_detector_area_resol_mean     ?
_diffrn_reflns_number     23930
_diffrn_reflns_av_R_equivalents     0.0368
_diffrn_reflns_av_unetI/netI     0.0300
_diffrn_reflns_theta_min     2.413
_diffrn_reflns_theta_max     31.185
_diffrn_reflns_theta_full     25.242
_diffrn_measured_fraction_theta_max     0.917
_diffrn_measured_fraction_theta_full     0.994
_diffrn_reflns_limit_h_min     -13
_diffrn_reflns_limit_h_max     13
_diffrn_reflns_limit_k_min     -14
_diffrn_reflns_limit_k_max     14
_diffrn_reflns_limit_l_min     -16
_diffrn_reflns_limit_l_max     15
_refine_special_details     ?
_reflns_number_total     5406
_reflns_number_gt     4766
_reflns_threshold_expression     'I > 2σ(I)'
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all     0.0332
_refine_ls_R_factor_gt     0.0258
_refine_ls_wR_factor_gt     0.0620
_refine_ls_wR_factor_ref     0.0651
_refine_ls_goodness_of_fit_ref     1.051
_refine_ls_restrained_S_all     1.051
_refine_ls_number_reflns     5406
_refine_ls_number_parameters     294
_refine_ls_number_restraints     0
_refine_ls_hydrogen_treatment     refall
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
              'w=1/[σ²(Fo²)+(0.0337P)²+0.3223P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_hydrogens     difmap
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary     ?
_refine_ls_shift/su_max     0.001
_refine_ls_shift/su_mean     0.000
_refine_diff_density_max     0.686
_refine_diff_density_min     -0.468
_refine_ls_extinction_method     none
_refine_ls_extinction_coef     .
loop_
    _atom_type_symbol
    _atom_type_description
    _atom_type_scat_dispersion_real
    _atom_type_scat_dispersion_imag
    _atom_type_scat_source
    'C' 'C' 0.0033 0.0016
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'H' 'H' 0.0000 0.0000
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'N' 'N' 0.0061 0.0033
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'O' 'O' 0.0106 0.0060
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'Se' 'Se' -0.0929 2.2259
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
_computing_data_collection
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_cell_refinement
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_data_reduction
;
CrysAlis PRO (Rigaku OD, 2015)
;
_computing_structure_solution
;
SHELXT2014 (Sheldrick, 2015a)
;
_computing_structure_refinement
;
SHELXL2018 (Sheldrick, 2015b)
;
_computing_molecular_graphics
;
OLEX2 (Dolomanov et al., 2009)
;
_computing_publication_material
;
OLEX2 (Dolomanov et al., 2009)
;
loop_
    _atom_site_type_symbol
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    _atom_site_adp_type
    _atom_site_calc_flag
    _atom_site_occupancy
    _atom_site_disorder_assembly
    _atom_site_disorder_group
    Se Se1 0.04380(2) 0.49656(2) 0.30624(2) 0.02120(5) Uani d 1 . .
    Se Se2 0.20175(2) 0.43386(2) 0.47712(2) 0.02078(5) Uani d 1 . .
    O O1 0.62718(14) 0.68582(15) 0.30763(12) 0.0268(3) Uani d 1 . .
    O O2 0.39283(14) 0.78120(14) 0.54761(12) 0.0245(3) Uani d 1 . .
    O O3 0.63606(14) 0.85044(14) 0.70736(11) 0.0236(2) Uani d 1 . .
    N N1 0.38224(16) 0.65545(16) 0.31384(14) 0.0212(3) Uani d 1 . .
    H H1 0.341(3) 0.677(2) 0.364(2) 0.028(6) Uiso d 1 . .
    N N2 0.61486(15) 0.79034(15) 0.50056(13) 0.0188(3) Uani d 1 . .
    C C1 0.13119(19) 0.46199(18) 0.17561(16) 0.0206(3) Uani d 1 . .
    C C2 0.0308(2) 0.3550(2) 0.05685(18) 0.0254(3) Uani d 1 . .
    H H2 -0.070(2) 0.298(2) 0.052(2) 0.025(5) Uiso d 1 . .
    C C3 0.0783(2) 0.3337(2) -0.04709(18) 0.0292(4) Uani d 1 . .
    H H3 0.006(3) 0.266(3) -0.126(2) 0.038(6) Uiso d 1 . .
    C C4 0.2278(2) 0.4198(2) -0.03280(18) 0.0289(4) Uani d 1 . .
    H H4 0.257(3) 0.413(2) -0.099(2) 0.029(6) Uiso d 1 . .
    C C5 0.3309(2) 0.5270(2) 0.08602(18) 0.0254(3) Uani d 1 . .
    H H5 0.427(3) 0.587(2) 0.095(2) 0.030(6) Uiso d 1 . .
    C C6 0.28439(19) 0.54868(18) 0.19161(16) 0.0200(3) Uani d 1 . .
    C C7 0.54289(18) 0.70675(18) 0.36558(16) 0.0192(3) Uani d 1 . .
    C C8 0.78540(18) 0.86088(18) 0.55745(15) 0.0191(3) Uani d 1 . .
    C C9 0.88618(18) 0.78022(18) 0.58540(16) 0.0190(3) Uani d 1 . .
    C C10 1.0487(2) 0.8571(2) 0.65130(18) 0.0246(3) Uani d 1 . .
    H H10 1.115(2) 0.803(2) 0.668(2) 0.023(5) Uiso d 1 . .
    C C11 1.1079(2) 1.0112(2) 0.68627(18) 0.0259(4) Uani d 1 . .
    H H11 1.216(3) 1.063(3) 0.728(2) 0.040(6) Uiso d 1 . .
    C C12 1.0078(2) 1.0906(2) 0.65271(17) 0.0241(3) Uani d 1 . .
    H H12 1.048(2) 1.191(2) 0.666(2) 0.025(5) Uiso d 1 . .
    C C13 0.8458(2) 1.01533(19) 0.58854(17) 0.0221(3) Uani d 1 . .
    H H13 0.776(2) 1.067(2) 0.564(2) 0.021(5) Uiso d 1 . .
    C C14 0.53423(19) 0.80575(18) 0.58434(16) 0.0193(3) Uani d 1 . .
    C C15 0.5869(2) 0.8912(2) 0.81793(17) 0.0239(3) Uani d 1 . .
    C C16 0.7421(3) 0.9359(3) 0.9349(2) 0.0343(4) Uani d 1 . .
    H H16A 0.734(3) 0.967(3) 1.013(3) 0.043(7) Uiso d 1 . .
    H H16C 0.813(3) 1.004(3) 0.926(2) 0.042(7) Uiso d 1 . .
    C C17 0.5305(3) 1.0216(3) 0.8070(2) 0.0378(5) Uani d 1 . .
    H H17A 0.608(3) 1.099(3) 0.801(2) 0.033(6) Uiso d 1 . .
    H H17B 0.436(3) 0.997(3) 0.726(3) 0.039(6) Uiso d 1 . .
    H H17C 0.514(4) 1.044(3) 0.883(3) 0.063(9) Uiso d 1 . .
    C C18 0.4628(3) 0.7560(3) 0.8179(2) 0.0353(4) Uani d 1 . .
    H H18A 0.447(3) 0.781(3) 0.896(3) 0.055(8) Uiso d 1 . .
    H H18B 0.361(3) 0.723(3) 0.744(3) 0.044(7) Uiso d 1 . .
    H H18C 0.501(3) 0.673(3) 0.814(3) 0.054(8) Uiso d 1 . .
_geom_special_details
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;
loop_
    _geom_bond_atom_site_label_1
    _geom_bond_atom_site_label_2
    _geom_bond_site_symmetry_2
    _geom_bond_distance
    _geom_bond_publ_flag
    Se1 C1 . 1.9235(17) ?
    Se1 Se2 . 2.3327(2) ?
    Se2 C9 2_666 1.9219(16) ?
    O1 C7 . 1.214(2) ?
    O2 C14 . 1.2128(19) ?
    O3 C14 . 1.323(2) ?
    O3 C15 . 1.486(2) ?
    N1 C7 . 1.356(2) ?
    N1 C6 . 1.407(2) ?
    N1 H1 . 0.81(2) ?
    N2 C14 . 1.401(2) ?
    N2 C7 . 1.423(2) ?
    N2 C8 . 1.4465(19) ?
    C1 C2 . 1.388(2) ?
    C1 C6 . 1.410(2) ?
    C2 C3 . 1.382(3) ?
    C2 H2 . 0.95(2) ?
    C3 C4 . 1.385(3) ?
    C3 H3 . 0.92(2) ?
    C4 C5 . 1.394(3) ?
    C4 H4 . 0.87(2) ?
    C5 C6 . 1.394(2) ?
    C5 H5 . 0.91(2) ?
    C8 C9 . 1.389(2) ?
    C8 C13 . 1.390(2) ?
    C9 C10 . 1.395(2) ?
    C10 C11 . 1.384(3) ?
    C10 H10 . 0.92(2) ?
    C11 C12 . 1.384(3) ?
    C11 H11 . 0.93(2) ?
    C12 C13 . 1.388(2) ?
    C12 H12 . 0.92(2) ?
    C13 H13 . 0.94(2) ?
    C15 C17 . 1.513(3) ?
    C15 C18 . 1.518(3) ?
    C15 C16 . 1.522(3) ?
    C16 H16A . 0.91(3) ?
    C16 H16C . 0.85(3) ?
    C17 H17A . 0.93(2) ?
    C17 H17B . 0.99(3) ?
    C17 H17C . 0.92(3) ?
    C18 H18A . 0.94(3) ?
    C18 H18B . 0.98(3) ?
    C18 H18C . 0.96(3) ?
loop_
    _geom_angle_atom_site_label_1
    _geom_angle_atom_site_label_2
    _geom_angle_atom_site_label_3
    _geom_angle_site_symmetry_1
    _geom_angle_site_symmetry_3
    _geom_angle
    _geom_angle_publ_flag
    C1 Se1 Se2 . . 102.63(5) ?
    C9 Se2 Se1 2_666 . 101.30(5) ?
    C14 O3 C15 . . 121.28(13) ?
    C7 N1 C6 . . 125.87(15) ?
    C7 N1 H1 . . 115.5(16) ?
    C6 N1 H1 . . 117.5(16) ?
    C14 N2 C7 . . 125.19(13) ?
    C14 N2 C8 . . 117.10(13) ?
    C7 N2 C8 . . 117.67(13) ?
    C2 C1 C6 . . 119.88(16) ?
    C2 C1 Se1 . . 116.87(13) ?
    C6 C1 Se1 . . 122.99(12) ?
    C3 C2 C1 . . 120.76(17) ?
    C3 C2 H2 . . 122.7(13) ?
    C1 C2 H2 . . 116.5(13) ?
    C2 C3 C4 . . 119.73(17) ?
    C2 C3 H3 . . 118.1(15) ?
    C4 C3 H3 . . 122.0(15) ?
    C3 C4 C5 . . 120.40(18) ?
    C3 C4 H4 . . 120.8(15) ?
    C5 C4 H4 . . 118.6(15) ?
    C6 C5 C4 . . 120.28(17) ?
    C6 C5 H5 . . 118.9(14) ?
    C4 C5 H5 . . 120.8(14) ?
    C5 C6 N1 . . 123.14(15) ?
    C5 C6 C1 . . 118.94(16) ?
    N1 C6 C1 . . 117.91(15) ?
    O1 C7 N1 . . 125.85(16) ?
    O1 C7 N2 . . 118.81(14) ?
    N1 C7 N2 . . 115.33(14) ?
    C9 C8 C13 . . 120.65(15) ?
    C9 C8 N2 . . 122.21(14) ?
    C13 C8 N2 . . 117.10(14) ?
    C8 C9 C10 . . 118.97(15) ?
    C8 C9 Se2 . 2_666 118.80(12) ?
    C10 C9 Se2 . 2_666 122.12(13) ?
    C11 C10 C9 . . 120.19(16) ?
    C11 C10 H10 . . 121.4(13) ?
    C9 C10 H10 . . 118.4(13) ?
    C12 C11 C10 . . 120.59(16) ?
    C12 C11 H11 . . 118.4(15) ?
    C10 C11 H11 . . 120.9(15) ?
    C11 C12 C13 . . 119.62(17) ?
    C11 C12 H12 . . 120.8(13) ?
    C13 C12 H12 . . 119.4(13) ?
    C12 C13 C8 . . 119.86(16) ?
    C12 C13 H13 . . 121.2(12) ?
    C8 C13 H13 . . 118.9(12) ?
    O2 C14 O3 . . 126.26(15) ?
    O2 C14 N2 . . 124.34(15) ?
    O3 C14 N2 . . 109.40(13) ?
    O3 C15 C17 . . 108.43(15) ?
    O3 C15 C18 . . 109.81(15) ?
    C17 C15 C18 . . 113.42(18) ?
    O3 C15 C16 . . 101.27(14) ?
    C17 C15 C16 . . 111.86(17) ?
    C18 C15 C16 . . 111.31(17) ?
    C15 C16 H16A . . 113.0(16) ?
    C15 C16 H16C . . 108.9(17) ?
    H16A C16 H16C . . 110(2) ?
    C15 C17 H17A . . 110.0(14) ?
    C15 C17 H17B . . 112.9(14) ?
    H17A C17 H17B . . 105(2) ?
    C15 C17 H17C . . 101.4(19) ?
    H17A C17 H17C . . 113(2) ?
    H17B C17 H17C . . 115(2) ?
    C15 C18 H18A . . 107.7(17) ?
    C15 C18 H18B . . 113.9(15) ?
    H18A C18 H18B . . 109(2) ?
    C15 C18 H18C . . 109.5(17) ?
    H18A C18 H18C . . 110(2) ?
    H18B C18 H18C . . 107(2) ?
loop_
    _geom_torsion_atom_site_label_1
    _geom_torsion_atom_site_label_2
    _geom_torsion_atom_site_label_3
    _geom_torsion_atom_site_label_4
    _geom_torsion_site_symmetry_1
    _geom_torsion_site_symmetry_2
    _geom_torsion_site_symmetry_3
    _geom_torsion_site_symmetry_4
    _geom_torsion
    _geom_torsion_publ_flag
    C6 C1 C2 C3 . . . . -1.0(3) ?
    Se1 C1 C2 C3 . . . . 173.31(14) ?
    C1 C2 C3 C4 . . . . 0.0(3) ?
    C2 C3 C4 C5 . . . . 0.5(3) ?
    C3 C4 C5 C6 . . . . -0.1(3) ?
    C4 C5 C6 N1 . . . . -179.62(16) ?
    C4 C5 C6 C1 . . . . -0.8(3) ?
    C7 N1 C6 C5 . . . . -28.0(3) ?
    C7 N1 C6 C1 . . . . 153.19(16) ?
    C2 C1 C6 C5 . . . . 1.3(2) ?
    Se1 C1 C6 C5 . . . . -172.56(13) ?
    C2 C1 C6 N1 . . . . -179.79(15) ?
    Se1 C1 C6 N1 . . . . 6.3(2) ?
    C6 N1 C7 O1 . . . . 11.6(3) ?
    C6 N1 C7 N2 . . . . -167.49(15) ?
    C14 N2 C7 O1 . . . . -170.50(15) ?
    C8 N2 C7 O1 . . . . 7.2(2) ?
    C14 N2 C7 N1 . . . . 8.6(2) ?
    C8 N2 C7 N1 . . . . -173.70(14) ?
    C14 N2 C8 C9 . . . . 103.85(18) ?
    C7 N2 C8 C9 . . . . -74.0(2) ?
    C14 N2 C8 C13 . . . . -73.60(19) ?
    C7 N2 C8 C13 . . . . 108.54(17) ?
    C13 C8 C9 C10 . . . . 3.3(2) ?
    N2 C8 C9 C10 . . . . -174.09(15) ?
    C13 C8 C9 Se2 . . . 2_666 -173.12(12) ?
    N2 C8 C9 Se2 . . . 2_666 9.5(2) ?
    C8 C9 C10 C11 . . . . -0.9(3) ?
    Se2 C9 C10 C11 2_666 . . . 175.31(14) ?
    C9 C10 C11 C12 . . . . -2.1(3) ?
    C10 C11 C12 C13 . . . . 2.9(3) ?
    C11 C12 C13 C8 . . . . -0.6(3) ?
    C9 C8 C13 C12 . . . . -2.5(3) ?
    N2 C8 C13 C12 . . . . 174.96(15) ?
    C15 O3 C14 O2 . . . . -6.4(3) ?
    C15 O3 C14 N2 . . . . 173.61(13) ?
    C7 N2 C14 O2 . . . . -18.5(3) ?
    C8 N2 C14 O2 . . . . 163.79(16) ?
    C7 N2 C14 O3 . . . . 161.44(14) ?
    C8 N2 C14 O3 . . . . -16.2(2) ?
    C14 O3 C15 C17 . . . . -61.3(2) ?
    C14 O3 C15 C18 . . . . 63.1(2) ?
    C14 O3 C15 C16 . . . . -179.11(16) ?
loop_
    _geom_hbond_atom_site_label_D
    _geom_hbond_atom_site_label_H
    _geom_hbond_atom_site_label_A
    _geom_hbond_site_symmetry_A
    _geom_hbond_distance_DH
    _geom_hbond_distance_HA
    _geom_hbond_distance_DA
    _geom_hbond_angle_DHA
    _geom_hbond_publ_flag
    N1 H1 Se1 . 0.81(2) 2.69(2) 3.1417(14) 116.8(18) yes
    N1 H1 Se2 . 0.81(2) 3.09(2) 3.5417(15) 117.9(18) yes
    N1 H1 O2 . 0.81(2) 1.96(2) 2.6454(19) 142(2) yes
    C5 H5 O1 . 0.91(2) 2.36(2) 2.888(2) 116.8(17) yes
    C10 H10 Se1 2_666 0.92(2) 3.02(2) 3.4886(18) 112.9(15) yes
    C13 H13 O2 2_676 0.94(2) 2.65(2) 3.569(2) 166.0(17) yes
    C17 H17B O2 . 0.99(3) 2.46(2) 3.018(3) 115.1(17) yes
    C18 H18B O2 . 0.98(3) 2.47(3) 2.982(3) 112.2(18) yes
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_shelx_estimated_absorpt_T_min     ?
_shelx_estimated_absorpt_T_max     ?
data_global
_journal_date_recd_electronic     2019-02-06
_journal_date_accepted     2019-02-14
_journal_name_full     'Acta Crystallographica, Section C'
_journal_year     2019
_journal_volume     75
_journal_issue      3
_journal_page_first     336
_journal_page_last     341
_journal_paper_category     FA
_journal_paper_doi     10.1107/S2053229619002341
_journal_coeditor_code     FN3298
_publ_contact_author_name     'Ray J. Butcher'
_publ_contact_author_address
;
Department of Chemistry
Howard University
525 College Street NW
Washington
DC 20059
USA
;
_publ_contact_author_email     'rbutcher99@yahoo.com'
_publ_contact_author_fax     '202-806-5442'
_publ_contact_author_phone     '703-585-6631'
_publ_section_title
;
Isolation and structure of an 18-membered macrocycle containing two diselenide
linkages and its precursor
;
_publ_section_title_footnote     .
loop_
    _publ_author_name
    _publ_author_footnote
    _publ_author_address
    'Raju, Saravanan' .
;
Department of Chemistry
Indian Institute of Technology Bombay
Powai
Mumbai 400 076
India
;
    'Butcher, Ray J.' .
;
Department of Chemistry
Howard University
525 College Street NW
Washington
DC 20059
USA
;
    'Singh, Harkesh B.' .
;
Department of Chemistry
Indian Institute of Technology Bombay
Powai
Mumbai 400 076
India
;
_publ_section_synopsis
;
The structures of the 18-membered azamacrocycle containing two disselenide
linkage and its precusor are reported.
;
