##############################################################################
#                                                                            #
# This CIF contains the data for a data article accepted for                 #
# publication in IUCrData. It conforms to the requirements of                #
# Notes for Authors for IUCrData, and has been                               #
# peer reviewed under the auspices of IUCrData.                              #
#                                                                            #
# 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 data    # 
# article from which it was obtained.                                        #
#                                                                            #
##############################################################################
data_I
_audit_creation_method     'SHELXL-2018/3'
_chemical_name_systematic
;
5,10-Dihydroindeno[2,1-a]indene
;
_chemical_name_common     ?
_chemical_formula_moiety     'C16 H12'
_chemical_formula_sum     'C16 H12'
_chemical_formula_iupac     'C16 H12'
_chemical_formula_weight     204.26
_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     7.5009(9)
_cell_length_b     7.6819(9)
_cell_length_c     19.387(3)
_cell_angle_alpha     99.733(11)
_cell_angle_beta     100.641(11)
_cell_angle_gamma     90.523(9)
_cell_volume     1081.2(2)
_cell_formula_units_Z     4
_cell_measurement_reflns_used     2411
_cell_measurement_theta_min     2.76
_cell_measurement_theta_max     27.96
_cell_measurement_temperature     193(2)
_exptl_crystal_description     'plate'
_exptl_crystal_colour     'colourless'
_exptl_crystal_size_max     0.220
_exptl_crystal_size_mid     0.150
_exptl_crystal_size_min     0.040
_exptl_crystal_density_diffrn     1.255
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     ?
_exptl_crystal_F_000     432
_exptl_absorpt_coefficient_mu     0.071
_exptl_absorpt_correction_type     none
_exptl_absorpt_process_details     ?
_exptl_absorpt_correction_T_min     ?
_exptl_absorpt_correction_T_max     ?
_diffrn_ambient_temperature     193(2)
_diffrn_source     'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_diffrn_radiation_type     MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_measurement_device_type     'Stoe IPDS 2T'
_diffrn_measurement_device     '2-circle goniometer'
_diffrn_measurement_method     'rotation method'
_diffrn_detector     'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean     6.67
_diffrn_reflns_number     14443
_diffrn_reflns_av_R_equivalents     ?
_diffrn_reflns_av_unetI/netI     0.0647
_diffrn_reflns_theta_min     2.693
_diffrn_reflns_theta_max     28.378
_diffrn_reflns_theta_full     25.242
_diffrn_measured_fraction_theta_max     0.986
_diffrn_measured_fraction_theta_full     0.999
_diffrn_reflns_limit_h_min     -9
_diffrn_reflns_limit_h_max     9
_diffrn_reflns_limit_k_min     -10
_diffrn_reflns_limit_k_max     10
_diffrn_reflns_limit_l_min     -25
_diffrn_reflns_limit_l_max     25
_refine_special_details
;
 Refined as a 2-component twin.
 BASF   0.40850
 Twin law for transforming hkl(1) to hkl(2):   -1.00006  0.00023  0.00003
                                                0.00016 -1.00020  0.00001
                                                0.95946  0.87001  1.00038
Hydrogen atoms attached to carbons were placed at calculated
positions and were refined in the riding-model approximation with isotropic
displacement parameters set to 1.2 Ueq(C).
;
_reflns_number_total     14443
_reflns_number_gt     7500
_reflns_threshold_expression     'I > 2σ(I)'
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all     0.1351
_refine_ls_R_factor_gt     0.0560
_refine_ls_wR_factor_gt     0.1146
_refine_ls_wR_factor_ref     0.1413
_refine_ls_goodness_of_fit_ref     1.031
_refine_ls_restrained_S_all     1.031
_refine_ls_number_reflns     14443
_refine_ls_number_parameters     290
_refine_ls_number_restraints     0
_refine_ls_hydrogen_treatment     constr
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
              'w=1/[σ²(Fo²)+(0.0513P)²+0.1143P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_hydrogens     geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary     ?
_refine_ls_shift/su_max     0.000
_refine_ls_shift/su_mean     0.000
_refine_diff_density_max     0.291
_refine_diff_density_min     -0.211
_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'
_computing_data_collection
;
X-AREA (Stoe & Cie, 1996)
;
_computing_cell_refinement
;
X-AREA (Stoe & Cie, 1996)
;
_computing_data_reduction
;
X-RED (Stoe & Cie, 1996)
;
_computing_structure_solution
;
SHELXT2014 (Sheldrick, 2015a)
;
_computing_structure_refinement
;
SHELXL2018 (Sheldrick, 2015b)
;
_computing_molecular_graphics
;
PLATON (Spek, 2009)
;
_computing_publication_material
;
SHELXL2018 (Sheldrick, 2015b)
;
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
    C C1A 0.6265(4) 0.1349(3) 0.58366(16) 0.0420(7) Uani d 1 . .
    H H1A 0.570270 0.239199 0.607100 0.050 Uiso calc 1 . .
    H H1B 0.758394 0.160278 0.588948 0.050 Uiso calc 1 . .
    C C2A 0.5377(3) 0.0821(3) 0.50682(15) 0.0379(7) Uani d 1 . .
    C C3A 0.5094(3) 0.1575(3) 0.44194(16) 0.0371(7) Uani d 1 . .
    C C4A 0.5622(3) 0.3197(3) 0.42737(17) 0.0424(7) Uani d 1 . .
    H H4A 0.627703 0.406985 0.464147 0.051 Uiso calc 1 . .
    C C5A 0.5171(4) 0.3509(4) 0.35798(18) 0.0463(8) Uani d 1 . .
    H H5A 0.553328 0.460341 0.347082 0.056 Uiso calc 1 . .
    C C6A 0.4206(4) 0.2254(4) 0.30472(18) 0.0475(8) Uani d 1 . .
    H H6A 0.390593 0.250000 0.257642 0.057 Uiso calc 1 . .
    C C7A 0.3663(4) 0.0633(4) 0.31857(17) 0.0461(8) Uani d 1 . .
    H H7A 0.299603 -0.022537 0.281531 0.055 Uiso calc 1 . .
    C C8A 0.4111(3) 0.0299(3) 0.38696(16) 0.0396(7) Uani d 1 . .
    C C1B 0.9607(4) 0.6291(3) 0.58564(17) 0.0485(8) Uani d 1 . .
    H H1C 0.834972 0.652170 0.592501 0.058 Uiso calc 1 . .
    H H1D 1.040849 0.733646 0.609137 0.058 Uiso calc 1 . .
    C C2B 0.9702(4) 0.5806(3) 0.50825(17) 0.0428(7) Uani d 1 . .
    C C3B 0.9306(3) 0.6610(3) 0.44363(17) 0.0416(7) Uani d 1 . .
    C C4B 0.8648(4) 0.8222(3) 0.43136(18) 0.0472(8) Uani d 1 . .
    H H4B 0.837765 0.907055 0.469307 0.057 Uiso calc 1 . .
    C C5B 0.8391(4) 0.8579(4) 0.36300(19) 0.0512(8) Uani d 1 . .
    H H5B 0.792298 0.967956 0.353938 0.061 Uiso calc 1 . .
    C C6B 0.8799(4) 0.7372(4) 0.30744(19) 0.0523(8) Uani d 1 . .
    H H6B 0.862114 0.765677 0.260901 0.063 Uiso calc 1 . .
    C C7B 0.9472(4) 0.5735(4) 0.3191(2) 0.0537(9) Uani d 1 . .
    H H7B 0.974921 0.489898 0.280873 0.064 Uiso calc 1 . .
    C C8B 0.9724(3) 0.5359(3) 0.38743(18) 0.0439(7) Uani d 1 . .
    C C1C 0.6484(4) 0.4528(4) 0.08155(17) 0.0491(8) Uani d 1 . .
    H H1E 0.760177 0.527069 0.102405 0.059 Uiso calc 1 . .
    H H1F 0.670975 0.328768 0.087230 0.059 Uiso calc 1 . .
    C C2C 0.5827(3) 0.4677(3) 0.00581(17) 0.0422(7) Uani d 1 . .
    C C3C 0.6498(4) 0.4309(3) -0.06130(17) 0.0422(7) Uani d 1 . .
    C C4C 0.8104(4) 0.3624(3) -0.07899(18) 0.0506(8) Uani d 1 . .
    H H4C 0.903217 0.330126 -0.043541 0.061 Uiso calc 1 . .
    C C5C 0.8316(4) 0.3425(3) -0.14959(19) 0.0530(8) Uani d 1 . .
    H H5C 0.939557 0.295384 -0.162728 0.064 Uiso calc 1 . .
    C C6C 0.6969(4) 0.3906(4) -0.20061(19) 0.0537(8) Uani d 1 . .
    H H6C 0.713696 0.377195 -0.248581 0.064 Uiso calc 1 . .
    C C7C 0.5370(4) 0.4585(4) -0.18306(19) 0.0512(8) Uani d 1 . .
    H H7C 0.445029 0.491165 -0.218706 0.061 Uiso calc 1 . .
    C C8C 0.5134(4) 0.4776(3) -0.11433(17) 0.0429(7) Uani d 1 . .
    C C1D 0.1447(4) 0.1273(4) 0.08064(18) 0.0545(8) Uani d 1 . .
    H H1G 0.168542 0.255730 0.083898 0.065 Uiso calc 1 . .
    H H1H 0.255170 0.074407 0.103547 0.065 Uiso calc 1 . .
    C C2D 0.0818(4) 0.0383(3) 0.00570(18) 0.0461(8) Uani d 1 . .
    C C3D 0.1529(4) 0.0084(3) -0.06117(18) 0.0451(7) Uani d 1 . .
    C C4D 0.3153(4) 0.0594(3) -0.07869(19) 0.0525(8) Uani d 1 . .
    H H4D 0.406367 0.127811 -0.043834 0.063 Uiso calc 1 . .
    C C5D 0.3409(4) 0.0080(4) -0.1484(2) 0.0555(8) Uani d 1 . .
    H H5D 0.450338 0.041999 -0.161536 0.067 Uiso calc 1 . .
    C C6D 0.2082(5) -0.0922(4) -0.1985(2) 0.0569(9) Uani d 1 . .
    H H6D 0.227975 -0.128483 -0.245749 0.068 Uiso calc 1 . .
    C C7D 0.0464(4) -0.1404(4) -0.18077(19) 0.0538(8) Uani d 1 . .
    H H7D -0.044961 -0.208078 -0.215738 0.065 Uiso calc 1 . .
    C C8D 0.0193(4) -0.0903(3) -0.11304(19) 0.0467(8) Uani 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
    C1A C2A . 1.500(4) ?
    C1A C8A 2_656 1.518(4) ?
    C1A H1A . 0.9900 ?
    C1A H1B . 0.9900 ?
    C2A C2A 2_656 1.341(4) ?
    C2A C3A . 1.453(4) ?
    C3A C4A . 1.393(3) ?
    C3A C8A . 1.408(4) ?
    C4A C5A . 1.387(4) ?
    C4A H4A . 0.9500 ?
    C5A C6A . 1.376(4) ?
    C5A H5A . 0.9500 ?
    C6A C7A . 1.390(4) ?
    C6A H6A . 0.9500 ?
    C7A C8A . 1.374(4) ?
    C7A H7A . 0.9500 ?
    C1B C2B . 1.499(4) ?
    C1B C8B 2_766 1.506(4) ?
    C1B H1C . 0.9900 ?
    C1B H1D . 0.9900 ?
    C2B C2B 2_766 1.329(5) ?
    C2B C3B . 1.472(4) ?
    C3B C4B . 1.379(4) ?
    C3B C8B . 1.410(4) ?
    C4B C5B . 1.378(4) ?
    C4B H4B . 0.9500 ?
    C5B C6B . 1.379(4) ?
    C5B H5B . 0.9500 ?
    C6B C7B . 1.397(4) ?
    C6B H6B . 0.9500 ?
    C7B C8B . 1.384(4) ?
    C7B H7B . 0.9500 ?
    C1C C2C . 1.484(4) ?
    C1C C8C 2_665 1.531(4) ?
    C1C H1E . 0.9900 ?
    C1C H1F . 0.9900 ?
    C2C C2C 2_665 1.335(5) ?
    C2C C3C . 1.465(4) ?
    C3C C4C . 1.396(4) ?
    C3C C8C . 1.406(4) ?
    C4C C5C . 1.390(4) ?
    C4C H4C . 0.9500 ?
    C5C C6C . 1.377(4) ?
    C5C H5C . 0.9500 ?
    C6C C7C . 1.388(4) ?
    C6C H6C . 0.9500 ?
    C7C C8C . 1.360(4) ?
    C7C H7C . 0.9500 ?
    C1D C2D . 1.485(4) ?
    C1D C8D 2 1.526(4) ?
    C1D H1G . 0.9900 ?
    C1D H1H . 0.9900 ?
    C2D C2D 2 1.321(5) ?
    C2D C3D . 1.475(4) ?
    C3D C4D . 1.393(4) ?
    C3D C8D . 1.395(4) ?
    C4D C5D . 1.392(4) ?
    C4D H4D . 0.9500 ?
    C5D C6D . 1.380(4) ?
    C5D H5D . 0.9500 ?
    C6D C7D . 1.385(4) ?
    C6D H6D . 0.9500 ?
    C7D C8D . 1.357(4) ?
    C7D H7D . 0.9500 ?
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
    C2A C1A C8A . 2_656 101.2(2) ?
    C2A C1A H1A . . 111.5 ?
    C8A C1A H1A 2_656 . 111.5 ?
    C2A C1A H1B . . 111.5 ?
    C8A C1A H1B 2_656 . 111.5 ?
    H1A C1A H1B . . 109.3 ?
    C2A C2A C3A 2_656 . 109.8(3) ?
    C2A C2A C1A 2_656 . 111.8(3) ?
    C3A C2A C1A . . 138.4(2) ?
    C4A C3A C8A . . 120.1(3) ?
    C4A C3A C2A . . 132.5(3) ?
    C8A C3A C2A . . 107.5(2) ?
    C5A C4A C3A . . 118.5(3) ?
    C5A C4A H4A . . 120.7 ?
    C3A C4A H4A . . 120.7 ?
    C6A C5A C4A . . 120.9(3) ?
    C6A C5A H5A . . 119.6 ?
    C4A C5A H5A . . 119.6 ?
    C5A C6A C7A . . 121.2(3) ?
    C5A C6A H6A . . 119.4 ?
    C7A C6A H6A . . 119.4 ?
    C8A C7A C6A . . 118.6(3) ?
    C8A C7A H7A . . 120.7 ?
    C6A C7A H7A . . 120.7 ?
    C7A C8A C3A . . 120.7(3) ?
    C7A C8A C1A . 2_656 129.7(3) ?
    C3A C8A C1A . 2_656 109.6(3) ?
    C2B C1B C8B . 2_766 101.0(2) ?
    C2B C1B H1C . . 111.6 ?
    C8B C1B H1C 2_766 . 111.6 ?
    C2B C1B H1D . . 111.6 ?
    C8B C1B H1D 2_766 . 111.6 ?
    H1C C1B H1D . . 109.4 ?
    C2B C2B C3B 2_766 . 109.3(4) ?
    C2B C2B C1B 2_766 . 112.7(4) ?
    C3B C2B C1B . . 138.0(2) ?
    C4B C3B C8B . . 120.6(3) ?
    C4B C3B C2B . . 132.7(3) ?
    C8B C3B C2B . . 106.7(2) ?
    C5B C4B C3B . . 118.7(3) ?
    C5B C4B H4B . . 120.7 ?
    C3B C4B H4B . . 120.7 ?
    C4B C5B C6B . . 121.5(3) ?
    C4B C5B H5B . . 119.3 ?
    C6B C5B H5B . . 119.3 ?
    C5B C6B C7B . . 120.5(3) ?
    C5B C6B H6B . . 119.7 ?
    C7B C6B H6B . . 119.7 ?
    C8B C7B C6B . . 118.5(3) ?
    C8B C7B H7B . . 120.7 ?
    C6B C7B H7B . . 120.7 ?
    C7B C8B C3B . . 120.2(3) ?
    C7B C8B C1B . 2_766 129.5(3) ?
    C3B C8B C1B . 2_766 110.3(3) ?
    C2C C1C C8C . 2_665 100.7(2) ?
    C2C C1C H1E . . 111.6 ?
    C8C C1C H1E 2_665 . 111.6 ?
    C2C C1C H1F . . 111.6 ?
    C8C C1C H1F 2_665 . 111.6 ?
    H1E C1C H1F . . 109.4 ?
    C2C C2C C3C 2_665 . 109.6(3) ?
    C2C C2C C1C 2_665 . 113.0(4) ?
    C3C C2C C1C . . 137.4(2) ?
    C4C C3C C8C . . 120.1(3) ?
    C4C C3C C2C . . 133.1(3) ?
    C8C C3C C2C . . 106.8(2) ?
    C5C C4C C3C . . 118.6(3) ?
    C5C C4C H4C . . 120.7 ?
    C3C C4C H4C . . 120.7 ?
    C6C C5C C4C . . 120.4(3) ?
    C6C C5C H5C . . 119.8 ?
    C4C C5C H5C . . 119.8 ?
    C5C C6C C7C . . 121.1(3) ?
    C5C C6C H6C . . 119.5 ?
    C7C C6C H6C . . 119.5 ?
    C8C C7C C6C . . 119.3(3) ?
    C8C C7C H7C . . 120.3 ?
    C6C C7C H7C . . 120.3 ?
    C7C C8C C3C . . 120.5(3) ?
    C7C C8C C1C . 2_665 129.5(3) ?
    C3C C8C C1C . 2_665 109.9(3) ?
    C2D C1D C8D . 2 100.7(2) ?
    C2D C1D H1G . . 111.6 ?
    C8D C1D H1G 2 . 111.6 ?
    C2D C1D H1H . . 111.6 ?
    C8D C1D H1H 2 . 111.6 ?
    H1G C1D H1H . . 109.4 ?
    C2D C2D C3D 2 . 109.2(4) ?
    C2D C2D C1D 2 . 113.2(4) ?
    C3D C2D C1D . . 137.5(2) ?
    C4D C3D C8D . . 120.2(3) ?
    C4D C3D C2D . . 132.9(3) ?
    C8D C3D C2D . . 106.9(3) ?
    C5D C4D C3D . . 118.5(3) ?
    C5D C4D H4D . . 120.8 ?
    C3D C4D H4D . . 120.8 ?
    C6D C5D C4D . . 120.3(3) ?
    C6D C5D H5D . . 119.8 ?
    C4D C5D H5D . . 119.8 ?
    C5D C6D C7D . . 120.7(3) ?
    C5D C6D H6D . . 119.6 ?
    C7D C6D H6D . . 119.6 ?
    C8D C7D C6D . . 119.6(3) ?
    C8D C7D H7D . . 120.2 ?
    C6D C7D H7D . . 120.2 ?
    C7D C8D C3D . . 120.7(3) ?
    C7D C8D C1D . 2 129.4(3) ?
    C3D C8D C1D . 2 109.9(3) ?
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
    C8A C1A C2A C2A 2_656 . . 2_656 -0.1(3) ?
    C8A C1A C2A C3A 2_656 . . . -179.9(3) ?
    C2A C2A C3A C4A 2_656 . . . -178.8(3) ?
    C1A C2A C3A C4A . . . . 1.0(5) ?
    C2A C2A C3A C8A 2_656 . . . 0.1(3) ?
    C1A C2A C3A C8A . . . . 179.9(3) ?
    C8A C3A C4A C5A . . . . -0.5(4) ?
    C2A C3A C4A C5A . . . . 178.3(3) ?
    C3A C4A C5A C6A . . . . 0.7(4) ?
    C4A C5A C6A C7A . . . . -0.4(4) ?
    C5A C6A C7A C8A . . . . -0.1(4) ?
    C6A C7A C8A C3A . . . . 0.3(4) ?
    C6A C7A C8A C1A . . . 2_656 -178.5(2) ?
    C4A C3A C8A C7A . . . . 0.0(4) ?
    C2A C3A C8A C7A . . . . -179.1(2) ?
    C4A C3A C8A C1A . . . 2_656 179.0(2) ?
    C2A C3A C8A C1A . . . 2_656 -0.1(3) ?
    C8B C1B C2B C2B 2_766 . . 2_766 0.2(4) ?
    C8B C1B C2B C3B 2_766 . . . 179.7(3) ?
    C2B C2B C3B C4B 2_766 . . . 179.1(3) ?
    C1B C2B C3B C4B . . . . -0.4(5) ?
    C2B C2B C3B C8B 2_766 . . . -0.4(4) ?
    C1B C2B C3B C8B . . . . -179.9(3) ?
    C8B C3B C4B C5B . . . . 0.6(4) ?
    C2B C3B C4B C5B . . . . -178.9(3) ?
    C3B C4B C5B C6B . . . . -0.9(4) ?
    C4B C5B C6B C7B . . . . 0.7(4) ?
    C5B C6B C7B C8B . . . . -0.3(4) ?
    C6B C7B C8B C3B . . . . 0.0(4) ?
    C6B C7B C8B C1B . . . 2_766 178.9(3) ?
    C4B C3B C8B C7B . . . . -0.2(4) ?
    C2B C3B C8B C7B . . . . 179.4(2) ?
    C4B C3B C8B C1B . . . 2_766 -179.3(2) ?
    C2B C3B C8B C1B . . . 2_766 0.3(3) ?
    C8C C1C C2C C2C 2_665 . . 2_665 0.0(4) ?
    C8C C1C C2C C3C 2_665 . . . -180.0(3) ?
    C2C C2C C3C C4C 2_665 . . . -179.4(3) ?
    C1C C2C C3C C4C . . . . 0.6(5) ?
    C2C C2C C3C C8C 2_665 . . . 0.0(3) ?
    C1C C2C C3C C8C . . . . -180.0(3) ?
    C8C C3C C4C C5C . . . . 0.2(4) ?
    C2C C3C C4C C5C . . . . 179.5(3) ?
    C3C C4C C5C C6C . . . . 0.4(4) ?
    C4C C5C C6C C7C . . . . -0.5(4) ?
    C5C C6C C7C C8C . . . . 0.0(4) ?
    C6C C7C C8C C3C . . . . 0.6(4) ?
    C6C C7C C8C C1C . . . 2_665 -179.6(2) ?
    C4C C3C C8C C7C . . . . -0.7(4) ?
    C2C C3C C8C C7C . . . . 179.8(2) ?
    C4C C3C C8C C1C . . . 2_665 179.5(2) ?
    C2C C3C C8C C1C . . . 2_665 0.0(3) ?
    C8D C1D C2D C2D 2 . . 2 -0.7(4) ?
    C8D C1D C2D C3D 2 . . . -179.7(3) ?
    C2D C2D C3D C4D 2 . . . 179.8(3) ?
    C1D C2D C3D C4D . . . . -1.2(5) ?
    C2D C2D C3D C8D 2 . . . 0.4(4) ?
    C1D C2D C3D C8D . . . . 179.4(3) ?
    C8D C3D C4D C5D . . . . -0.8(4) ?
    C2D C3D C4D C5D . . . . 179.9(3) ?
    C3D C4D C5D C6D . . . . -0.4(4) ?
    C4D C5D C6D C7D . . . . 1.2(4) ?
    C5D C6D C7D C8D . . . . -0.8(4) ?
    C6D C7D C8D C3D . . . . -0.3(4) ?
    C6D C7D C8D C1D . . . 2 -179.6(3) ?
    C4D C3D C8D C7D . . . . 1.1(4) ?
    C2D C3D C8D C7D . . . . -179.4(2) ?
    C4D C3D C8D C1D . . . 2 -179.5(2) ?
    C2D C3D C8D C1D . . . 2 0.0(3) ?
_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     0.985
_shelx_estimated_absorpt_T_max     0.997
data_global
_journal_date_recd_electronic     2019-08-26
_journal_date_accepted     2019-08-27
_journal_name_full     'IUCrData'
_journal_year     2019
_journal_volume     4
_journal_issue      8
_journal_page_first     0
_journal_page_last     0
_journal_paper_category     HO
_journal_paper_doi     10.1107/S2414314619011799
_journal_coeditor_code     BT4085
_publ_contact_author_name     'Heiner Detert'
_publ_contact_author_address
;
University of Mainz
Institut of Organic Chemistry
Duesbergweg 10-14
55099 Mainz
Germany
;
_publ_contact_author_email     'detert@uni-mainz.de'
_publ_contact_author_fax     '+496131-3925338'
_publ_contact_author_phone     '+496131-3924189'
_publ_section_title
;
5,10-Dihydroindeno[2,1-a]indene
;
loop_
    _publ_author_name
    _publ_author_address
    'Detert, Heiner'
;
University of Mainz
Institute of Organic Chemistry
Duesbergweg 10-14
55099 Mainz
Germany
;
    'Schollmeyer, Dieter'
;
University of Mainz
Institute of Organic Chemistry
Duesbergweg 10-14
55099 Mainz
Germany
;
_publ_section_synopsis
;
The title compound, C₁₆H₁₂, crystallizes with four half molecules in the
asymmetric unit, each of which is located on a crystallographic centre of
inversion. The molecules are essentially planar. The crystal studied was a
non-merohedral twin.
;
