##############################################################################
#                                                                            #
# 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.                                        #
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##############################################################################
data_I
_audit_creation_method     SHELXL-97
_journal_date_recd_electronic     2023-08-22
_journal_date_accepted     2024-01-03
_journal_name_full     'Acta Crystallographica, Section C'
_journal_year     2024
_journal_volume     80
_journal_issue      2
_journal_page_first     49
_journal_page_last     55
_journal_paper_category     FA
_journal_paper_doi     10.1107/S205322962400010X
_journal_coeditor_code     OC3022
_publ_contact_author_name     'Yang, Ke'
_publ_contact_author_address
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
_publ_contact_author_email     yangke@cup.edu.cn
_publ_section_title
;
High-pressure study of a 3d--4f heterometallic CuEu--organic
skeleton
;
loop_
    _publ_author_name
    _publ_author_footnote
    _publ_author_address
    'Yang, Ke'
;
These authors contributed equally to this work,
;
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Yang, Yuting'
;
These authors contributed equally to this work,
;
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Yao, Ziqin' .
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Cheng, Sisi' .
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Cui, Xue' .
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Wang, Xingyi' .
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Han, Yi' .
;
State Key Laboratory of Heavy Oil Processing
College of New Energy and Materials
China University of Petroleum-Beijing
Beijing 102249
People's Republic of China
;
    'Yi, Feiyan' .
;
State Key Laboratory Base of Novel Functional Materials and Preparation Science
School of Materials Science & Chemical Engineering
Ningbo University
Ningbo
Zhejiang 315211
People's Republic of China
;
    'Mo, Guang' .
;
Institute of High Energy Physics Chinese Academy of Sciences
Beijing 100049
People's Republic of China
;
_publ_section_synopsis
;
A 3d--4f heterometallic CuEu--organic framework NBU-8 was
prepared and a systematic high-pressure study of NBU-8 was carried out by
powder X-ray diffraction, high-pressure X-ray diffraction and molecular
dynamics simulations. It shows that this material is a dense packing material
and can be used as a promising molecular chemosensor for dimethylformamide
(DMF).
;
_chemical_name_systematic     ?
_chemical_name_common     ?
_chemical_formula_moiety     ?
_chemical_formula_sum     'C66 H44 Cu3 Eu2 N18 O31'
_chemical_formula_weight     2079.73
_chemical_melting_point     ?
_symmetry_cell_setting     trigonal
_symmetry_space_group_name_H-M     'R-3c'
loop_
    _symmetry_equiv_pos_as_xyz
    'x, y, z'
    '-y, x-y, z'
    '-x+y, -x, z'
    'y, x, -z+1/2'
    'x-y, -y, -z+1/2'
    '-x, -x+y, -z+1/2'
    'x+2/3, y+1/3, z+1/3'
    '-y+2/3, x-y+1/3, z+1/3'
    '-x+y+2/3, -x+1/3, z+1/3'
    'y+2/3, x+1/3, -z+5/6'
    'x-y+2/3, -y+1/3, -z+5/6'
    '-x+2/3, -x+y+1/3, -z+5/6'
    'x+1/3, y+2/3, z+2/3'
    '-y+1/3, x-y+2/3, z+2/3'
    '-x+y+1/3, -x+2/3, z+2/3'
    'y+1/3, x+2/3, -z+7/6'
    'x-y+1/3, -y+2/3, -z+7/6'
    '-x+1/3, -x+y+2/3, -z+7/6'
    '-x, -y, -z'
    'y, -x+y, -z'
    'x-y, x, -z'
    '-y, -x, z-1/2'
    '-x+y, y, z-1/2'
    'x, x-y, z-1/2'
    '-x+2/3, -y+1/3, -z+1/3'
    'y+2/3, -x+y+1/3, -z+1/3'
    'x-y+2/3, x+1/3, -z+1/3'
    '-y+2/3, -x+1/3, z-1/6'
    '-x+y+2/3, y+1/3, z-1/6'
    'x+2/3, x-y+1/3, z-1/6'
    '-x+1/3, -y+2/3, -z+2/3'
    'y+1/3, -x+y+2/3, -z+2/3'
    'x-y+1/3, x+2/3, -z+2/3'
    '-y+1/3, -x+2/3, z+1/6'
    '-x+y+1/3, y+2/3, z+1/6'
    'x+1/3, x-y+2/3, z+1/6'
_cell_length_a     14.0021(3)
_cell_length_b     14.0021(3)
_cell_length_c     63.523(3)
_cell_angle_alpha     90.00
_cell_angle_beta     90.00
_cell_angle_gamma     120.00
_cell_volume     10785.7(5)
_cell_formula_units_Z     6
_cell_measurement_reflns_used     4858
_cell_measurement_theta_min     2.91
_cell_measurement_theta_max     26.05
_cell_measurement_temperature     296(2)
_exptl_crystal_description     'brick'
_exptl_crystal_colour     'blue'
_exptl_crystal_size_max     0.25
_exptl_crystal_size_mid     0.23
_exptl_crystal_size_min     0.20
_exptl_crystal_density_diffrn     1.921
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     'not measured'
_exptl_crystal_F_000     6162
_exptl_absorpt_coefficient_mu     2.697
_exptl_absorpt_correction_type     multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G. M.. SADABS
;
_exptl_absorpt_correction_T_min     0.6592
_exptl_absorpt_correction_T_max     0.7453
_exptl_special_details     ?
_diffrn_ambient_temperature     296(2)
_diffrn_radiation_type     MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_source     'fine-focus sealed tube'
_diffrn_radiation_monochromator     graphite
_diffrn_measurement_device_type     'CCD area detector'
_diffrn_measurement_method     'phi and omega scans'
_diffrn_detector_area_resol_mean     ?
_diffrn_reflns_number     21300
_diffrn_reflns_av_R_equivalents     0.0472
_diffrn_reflns_av_sigmaI/netI     0.0231
_diffrn_reflns_theta_min     1.92
_diffrn_reflns_theta_max     26.07
_diffrn_reflns_theta_full     26.07
_diffrn_measured_fraction_theta_max     0.994
_diffrn_measured_fraction_theta_full     0.994
_diffrn_reflns_limit_h_min     -17
_diffrn_reflns_limit_h_max     14
_diffrn_reflns_limit_k_min     -17
_diffrn_reflns_limit_k_max     17
_diffrn_reflns_limit_l_min     -78
_diffrn_reflns_limit_l_max     65
_refine_special_details
;
 Refinement of F² against ALL reflections.  The weighted R-factor wR and
 goodness of fit S are based on F², conventional R-factors R are based
 on F, with F set to zero for negative F². The threshold expression of
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is
 not relevant to the choice of reflections for refinement.  R-factors based
 on F² are statistically about twice as large as those based on F, and R-
 factors based on ALL data will be even larger.
;
_reflns_number_total     2373
_reflns_number_gt     2002
_reflns_threshold_expression     >2sigma(I)
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all     0.0377
_refine_ls_R_factor_gt     0.0296
_refine_ls_wR_factor_gt     0.0856
_refine_ls_wR_factor_ref     0.0912
_refine_ls_goodness_of_fit_ref     1.075
_refine_ls_restrained_S_all     1.075
_refine_ls_number_reflns     2373
_refine_ls_number_parameters     180
_refine_ls_number_restraints     0
_refine_ls_hydrogen_treatment     constr
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
        'calc w=1/[σ²(Fo²)+(0.0569P)²+20.0828P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_hydrogens     geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary     difmap
_refine_ls_shift/su_max     0.000
_refine_ls_shift/su_mean     0.000
_refine_diff_density_max     2.149
_refine_diff_density_min     -0.591
_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'
    'Cu' 'Cu' 0.3201 1.2651
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'Eu' 'Eu' -0.1578 3.6682
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
_computing_data_collection     'Bruker SMART'
_computing_cell_refinement     'Bruker SMART'
_computing_data_reduction     'Bruker SAINT'
_computing_structure_solution
;
SHELXS97
;
_computing_structure_refinement
;
SHELXL97
;
_computing_molecular_graphics     'Bruker SHELXTL'
_computing_publication_material     'Bruker SHELXTL'
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_refinement_flags
    _atom_site_occupancy
    _atom_site_symmetry_multiplicity
    _atom_site_disorder_assembly
    _atom_site_disorder_group
    Eu Eu1 1.0000 0.0000 0.075327(4) 0.02052(13) Uani d S 1 3 . .
    Cu Cu1 1.0000 0.37628(4) 0.2500 0.02130(17) Uani d S 1 2 . .
    N N1 0.9450(2) 0.2460(2) 0.22993(4) 0.0241(6) Uani d . 1 1 . .
    N N2 0.8518(3) 0.0527(3) 0.22484(5) 0.0469(10) Uani d . 1 1 . .
    N N3 0.8745(3) -0.2084(3) 0.05255(6) 0.0338(8) Uani d . 1 1 . .
    C C1 1.0971(3) 0.2270(3) 0.11008(5) 0.0216(7) Uani d . 1 1 . .
    C C2 1.0514(3) 0.2191(3) 0.13157(5) 0.0221(7) Uani d . 1 1 . .
    C C3 0.9584(3) 0.1229(3) 0.13794(5) 0.0286(8) Uani d . 1 1 . .
    H H3A 0.9197 0.0670 0.1282 0.034 Uiso calc R 1 1 . .
    C C4 0.9224(3) 0.1088(3) 0.15859(6) 0.0294(8) Uani d . 1 1 . .
    H H4A 0.8604 0.0432 0.1626 0.035 Uiso calc R 1 1 . .
    C C5 0.9774(3) 0.1907(3) 0.17335(5) 0.0229(7) Uani d . 1 1 . .
    C C6 1.0691(3) 0.2882(3) 0.16693(6) 0.0348(9) Uani d . 1 1 . .
    H H6A 1.1062 0.3448 0.1766 0.042 Uiso calc R 1 1 . .
    C C7 1.1062(3) 0.3027(3) 0.14626(5) 0.0306(8) Uani d . 1 1 . .
    H H7A 1.1678 0.3686 0.1422 0.037 Uiso calc R 1 1 . .
    C C8 0.9432(3) 0.1740(3) 0.19581(5) 0.0248(7) Uani d . 1 1 . .
    C C9 0.8809(4) 0.0704(3) 0.20466(6) 0.0412(11) Uani d . 1 1 . .
    H H9A 0.8579 0.0094 0.1960 0.049 Uiso calc R 1 1 . .
    C C10 0.8846(4) 0.1413(3) 0.23663(6) 0.0357(10) Uani d . 1 1 . .
    H H10A 0.8642 0.1304 0.2507 0.043 Uiso calc R 1 1 . .
    C C11 0.9723(3) 0.2605(3) 0.20960(5) 0.0245(7) Uani d . 1 1 . .
    H H11A 1.0127 0.3321 0.2045 0.029 Uiso calc R 1 1 . .
    O O1 1.0467(2) 0.1468(2) 0.09779(4) 0.0377(7) Uani d . 1 1 . .
    O O2 1.1875(2) 0.3124(2) 0.10583(4) 0.0259(5) Uani d . 1 1 . .
    O O3 0.9371(2) -0.1995(2) 0.06795(4) 0.0350(6) Uani d . 1 1 . .
    O O4 0.8741(2) -0.1208(2) 0.04757(4) 0.0383(7) Uani d . 1 1 . .
    O O5 0.8196(3) -0.2949(3) 0.04348(6) 0.0617(10) Uani d . 1 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
    Eu1 O1 3_765 2.312(3) ?
    Eu1 O1 2_645 2.312(3) ?
    Eu1 O1 . 2.312(3) ?
    Eu1 O4 3_765 2.469(3) ?
    Eu1 O4 2_645 2.469(3) ?
    Eu1 O4 . 2.469(3) ?
    Eu1 O3 . 2.518(3) ?
    Eu1 O3 2_645 2.518(3) ?
    Eu1 O3 3_765 2.518(3) ?
    Eu1 N3 3_765 2.927(3) ?
    Eu1 N3 . 2.927(3) ?
    Eu1 N3 2_645 2.927(3) ?
    Cu1 O2 34_665 1.945(2) ?
    Cu1 O2 26_565 1.945(2) ?
    Cu1 N1 . 2.035(3) ?
    Cu1 N1 6_765 2.035(3) ?
    Cu1 O3 35_755 2.580(3) ?
    Cu1 O3 27_445 2.580(3) ?
    N1 C11 . 1.334(4) ?
    N1 C10 . 1.343(5) ?
    N2 C10 . 1.319(5) ?
    N2 C9 . 1.330(5) ?
    N3 O5 . 1.208(4) ?
    N3 O4 . 1.270(4) ?
    N3 O3 . 1.277(4) ?
    C1 O1 . 1.256(4) ?
    C1 O2 . 1.261(5) ?
    C1 C2 . 1.488(5) ?
    C2 C3 . 1.386(5) ?
    C2 C7 . 1.390(5) ?
    C3 C4 . 1.384(5) ?
    C3 H3A . 0.9300 ?
    C4 C5 . 1.380(5) ?
    C4 H4A . 0.9300 ?
    C5 C6 . 1.388(5) ?
    C5 C8 . 1.486(4) ?
    C6 C7 . 1.389(5) ?
    C6 H6A . 0.9300 ?
    C7 H7A . 0.9300 ?
    C8 C11 . 1.380(5) ?
    C8 C9 . 1.384(5) ?
    C9 H9A . 0.9300 ?
    C10 H10A . 0.9300 ?
    C11 H11A . 0.9300 ?
    O2 Cu1 27_545 1.945(2) ?
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
    O1 Eu1 O1 3_765 2_645 85.90(11) ?
    O1 Eu1 O1 3_765 . 85.90(11) ?
    O1 Eu1 O1 2_645 . 85.90(11) ?
    O1 Eu1 O4 3_765 3_765 146.86(10) ?
    O1 Eu1 O4 2_645 3_765 124.99(9) ?
    O1 Eu1 O4 . 3_765 84.92(10) ?
    O1 Eu1 O4 3_765 2_645 84.92(10) ?
    O1 Eu1 O4 2_645 2_645 146.86(10) ?
    O1 Eu1 O4 . 2_645 124.99(9) ?
    O4 Eu1 O4 3_765 2_645 74.64(11) ?
    O1 Eu1 O4 3_765 . 125.00(9) ?
    O1 Eu1 O4 2_645 . 84.92(11) ?
    O1 Eu1 O4 . . 146.86(10) ?
    O4 Eu1 O4 3_765 . 74.64(11) ?
    O4 Eu1 O4 2_645 . 74.64(11) ?
    O1 Eu1 O3 3_765 . 74.13(9) ?
    O1 Eu1 O3 2_645 . 74.35(10) ?
    O1 Eu1 O3 . . 152.61(10) ?
    O4 Eu1 O3 3_765 . 121.91(10) ?
    O4 Eu1 O3 2_645 . 72.51(9) ?
    O4 Eu1 O3 . . 51.18(9) ?
    O1 Eu1 O3 3_765 2_645 74.35(10) ?
    O1 Eu1 O3 2_645 2_645 152.62(10) ?
    O1 Eu1 O3 . 2_645 74.13(9) ?
    O4 Eu1 O3 3_765 2_645 72.51(9) ?
    O4 Eu1 O3 2_645 2_645 51.18(9) ?
    O4 Eu1 O3 . 2_645 121.90(10) ?
    O3 Eu1 O3 . 2_645 116.62(4) ?
    O1 Eu1 O3 3_765 3_765 152.62(10) ?
    O1 Eu1 O3 2_645 3_765 74.13(9) ?
    O1 Eu1 O3 . 3_765 74.35(10) ?
    O4 Eu1 O3 3_765 3_765 51.18(9) ?
    O4 Eu1 O3 2_645 3_765 121.91(10) ?
    O4 Eu1 O3 . 3_765 72.51(9) ?
    O3 Eu1 O3 . 3_765 116.62(4) ?
    O3 Eu1 O3 2_645 3_765 116.61(4) ?
    O1 Eu1 N3 3_765 3_765 162.42(10) ?
    O1 Eu1 N3 2_645 3_765 99.78(10) ?
    O1 Eu1 N3 . 3_765 78.00(11) ?
    O4 Eu1 N3 3_765 3_765 25.45(9) ?
    O4 Eu1 N3 2_645 3_765 98.49(10) ?
    O4 Eu1 N3 . 3_765 72.33(9) ?
    O3 Eu1 N3 . 3_765 123.38(9) ?
    O3 Eu1 N3 2_645 3_765 94.27(10) ?
    O3 Eu1 N3 3_765 3_765 25.74(9) ?
    O1 Eu1 N3 3_765 . 99.78(10) ?
    O1 Eu1 N3 2_645 . 78.00(11) ?
    O1 Eu1 N3 . . 162.42(10) ?
    O4 Eu1 N3 3_765 . 98.49(10) ?
    O4 Eu1 N3 2_645 . 72.33(9) ?
    O4 Eu1 N3 . . 25.45(9) ?
    O3 Eu1 N3 . . 25.74(9) ?
    O3 Eu1 N3 2_645 . 123.38(9) ?
    O3 Eu1 N3 3_765 . 94.27(10) ?
    N3 Eu1 N3 3_765 . 97.68(9) ?
    O1 Eu1 N3 3_765 2_645 77.99(11) ?
    O1 Eu1 N3 2_645 2_645 162.42(10) ?
    O1 Eu1 N3 . 2_645 99.78(10) ?
    O4 Eu1 N3 3_765 2_645 72.33(9) ?
    O4 Eu1 N3 2_645 2_645 25.45(9) ?
    O4 Eu1 N3 . 2_645 98.49(10) ?
    O3 Eu1 N3 . 2_645 94.28(10) ?
    O3 Eu1 N3 2_645 2_645 25.74(9) ?
    O3 Eu1 N3 3_765 2_645 123.38(9) ?
    N3 Eu1 N3 3_765 2_645 97.68(9) ?
    N3 Eu1 N3 . 2_645 97.68(9) ?
    O2 Cu1 O2 34_665 26_565 96.56(15) ?
    O2 Cu1 N1 34_665 . 166.84(11) ?
    O2 Cu1 N1 26_565 . 88.14(11) ?
    O2 Cu1 N1 34_665 6_765 88.14(11) ?
    O2 Cu1 N1 26_565 6_765 166.84(11) ?
    N1 Cu1 N1 . 6_765 89.98(16) ?
    O2 Cu1 O3 34_665 35_755 100.65(10) ?
    O2 Cu1 O3 26_565 35_755 82.50(10) ?
    N1 Cu1 O3 . 35_755 92.13(10) ?
    N1 Cu1 O3 6_765 35_755 84.56(10) ?
    O2 Cu1 O3 34_665 27_445 82.50(10) ?
    O2 Cu1 O3 26_565 27_445 100.65(10) ?
    N1 Cu1 O3 . 27_445 84.56(10) ?
    N1 Cu1 O3 6_765 27_445 92.13(10) ?
    O3 Cu1 O3 35_755 27_445 175.33(13) ?
    C11 N1 C10 . . 116.7(3) ?
    C11 N1 Cu1 . . 121.3(2) ?
    C10 N1 Cu1 . . 122.0(2) ?
    C10 N2 C9 . . 116.2(3) ?
    O5 N3 O4 . . 122.8(4) ?
    O5 N3 O3 . . 121.6(4) ?
    O4 N3 O3 . . 115.6(3) ?
    O5 N3 Eu1 . . 177.8(3) ?
    O4 N3 Eu1 . . 56.68(17) ?
    O3 N3 Eu1 . . 58.92(18) ?
    O1 C1 O2 . . 124.3(3) ?
    O1 C1 C2 . . 118.4(3) ?
    O2 C1 C2 . . 117.2(3) ?
    C3 C2 C7 . . 118.5(3) ?
    C3 C2 C1 . . 120.0(3) ?
    C7 C2 C1 . . 121.2(3) ?
    C4 C3 C2 . . 120.9(3) ?
    C4 C3 H3A . . 119.5 ?
    C2 C3 H3A . . 119.5 ?
    C5 C4 C3 . . 120.9(3) ?
    C5 C4 H4A . . 119.6 ?
    C3 C4 H4A . . 119.6 ?
    C4 C5 C6 . . 118.4(3) ?
    C4 C5 C8 . . 121.3(3) ?
    C6 C5 C8 . . 120.2(3) ?
    C5 C6 C7 . . 121.0(3) ?
    C5 C6 H6A . . 119.5 ?
    C7 C6 H6A . . 119.5 ?
    C6 C7 C2 . . 120.2(3) ?
    C6 C7 H7A . . 119.9 ?
    C2 C7 H7A . . 119.9 ?
    C11 C8 C9 . . 114.6(3) ?
    C11 C8 C5 . . 122.7(3) ?
    C9 C8 C5 . . 122.6(3) ?
    N2 C9 C8 . . 124.1(4) ?
    N2 C9 H9A . . 118.0 ?
    C8 C9 H9A . . 118.0 ?
    N2 C10 N1 . . 125.4(4) ?
    N2 C10 H10A . . 117.3 ?
    N1 C10 H10A . . 117.3 ?
    N1 C11 C8 . . 123.0(3) ?
    N1 C11 H11A . . 118.5 ?
    C8 C11 H11A . . 118.5 ?
    C1 O1 Eu1 . . 164.0(3) ?
    C1 O2 Cu1 . 27_545 128.1(2) ?
    N3 O3 Eu1 . . 95.3(2) ?
    N3 O4 Eu1 . . 97.9(2) ?
