5,14-Diaryldiindeno[2,1- f:1',2' -j]picene: A New Stable [7]Helicene with a Partial Biradical Character.
Hsieh, Ya-Chu; Wu, Cheng-Feng; Chen, Yi-Ting; Fang, Chia-Te; Wang, Chi-Shin; Li, Chia-Hsin; Chen, Liang-Yu; Cheng, Mu-Jeng; Chueh, Chu-Chen; Chou, Pi-Tai; Wu, Yao-Ting; Journal of the American Chemical Society 140 (2018) 14357–14366; doi:10.1021/jacs.8b08840

data_4133200
_publ_section_title
;
 5,14-Diaryldiindeno[2,1- f:1',2' -j]picene: A New Stable [7]Helicene with
 a Partial Biradical Character.
;
_journal_issue                   43
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14357
_journal_page_last               14366
_journal_paper_doi               10.1021/jacs.8b08840
_journal_volume                  140
_journal_year                    2018
_chemical_formula_sum            'C56 H46'
_chemical_formula_weight         718.93
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                90
_cell_angle_beta                 91.818(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.0798(5)
_cell_length_b                   10.3541(4)
_cell_length_c                   26.2464(10)
_cell_measurement_reflns_used    9929
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.3616
_cell_measurement_theta_min      2.4421
_cell_volume                     3824.4(2)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0300
_diffrn_reflns_av_unetI/netI     0.0191
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            28962
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.430
_diffrn_reflns_theta_min         2.442
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.9485
_exptl_absorpt_correction_T_min  0.8726
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/4 (Bruker AXS Inc.)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.249
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       tabullar
_exptl_crystal_F_000             1528
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.426
_refine_diff_density_min         -0.257
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     257
_refine_ls_number_reflns         3912
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0626
_refine_ls_R_factor_gt           0.0579
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0496P)^2^+7.9512P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1384
_refine_ls_wR_factor_ref         0.1413
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3545
_reflns_number_total             3912
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b08840_si_004.cif
_cod_data_source_block           171036lt_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4133200
_shelxl_version_number           2014/6
_shelx_res_checksum              61179
_shelx_hkl_checksum              53029