Linear π-conjugated polycyclic compounds consisting of four-, five-, and six-membered rings: benzo[1'',2'':3,4;4'',5'':3',4']bis(cyclobuta[1,2-<i>c</i>]thiophene).
Kuroiwa, Tatsuru; Asai, Daisuke; Hashimoto, Shingo; Tahara, Kazukuni; RSC advances 13 (2023) 4578–4583; doi:10.1039/d3ra00144j

data_7246388
_publ_section_title
;
 Linear &#x3c0;-conjugated polycyclic compounds consisting of four-,
 five-, and six-membered rings:
 benzo[1'',2'':3,4;4'',5'':3',4']bis(cyclobuta[1,2-<i>c</i>]thiophene).
;
_journal_issue                   7
_journal_name_full               'RSC advances'
_journal_page_first              4578
_journal_page_last               4583
_journal_paper_doi               10.1039/d3ra00144j
_journal_volume                  13
_journal_year                    2023
_chemical_formula_moiety         'C18 H14 S2'
_chemical_formula_sum            'C18 H14 S2'
_chemical_formula_weight         294.43
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_update_record
;
2022-12-01 deposited with the CCDC.	2023-01-27 downloaded from the CCDC.
;
_cell_angle_alpha                90.0000
_cell_angle_beta                 98.902(4)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            2
_cell_length_a                   5.9039(2)
_cell_length_b                   16.2762(6)
_cell_length_c                   7.6534(3)
_cell_measurement_reflns_used    7631
_cell_measurement_temperature    173
_cell_measurement_theta_max      30.31
_cell_measurement_theta_min      2.52
_cell_volume                     726.58(5)
_computing_cell_refinement       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_computing_molecular_graphics    'CrystalStructure 4.3'
_computing_publication_material  'CrystalStructure 4.3 (Rigaku, 2019)'
_computing_structure_refinement  'SHELXL Version 2014/7 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2014 (Burla, et al., 2014)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 14.629
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.901
_diffrn_measurement_device_type  'Rigaku Mercury70'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0143
_diffrn_reflns_av_unetI/netI     0.0098
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.901
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            8877
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.901
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.267
_diffrn_reflns_theta_min         2.971
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.352
_exptl_absorpt_correction_T_max  0.965
_exptl_absorpt_correction_T_min  0.833
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.46 (Rigaku Oxford Diffraction, 2018)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             308.00
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.35
_refine_diff_density_min         -0.30
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     93
_refine_ls_number_reflns         1965
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0343
_refine_ls_R_factor_gt           0.0311
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0563P)^2^+0.2293P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0930
_refine_ls_wR_factor_ref         0.0972
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1847
_reflns_number_total             1965
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            d3ra00144j2.cif
_cod_data_source_block           xcalibur_CCDC1
_cod_database_code               7246388
_shelx_res_checksum              93697