Antiaromatic bisindeno-[n]thienoacenes with small singlet biradical characters: syntheses, structures and chain length dependent physical properties
Shi, Xueliang; Burrezo, Paula Mayorga; Lee, Sangsu; Zhang, Wenhua; Zheng, Bin; Dai, Gaole; Chang, Jingjing; López Navarrete, Juan T.; Huang, Kuo-Wei; Kim, Dongho; Casado, Juan; Chi, Chunyan; Chem. Sci. 5 (2014) 4490–; doi:10.1039/C4SC01769B

data_1517099
_publ_section_title
;
 Antiaromatic bisindeno-[n]thienoacenes with small singlet biradical
 characters: syntheses, structures and chain length dependent physical
 properties
;
_journal_issue                   11
_journal_name_full               'Chem. Sci.'
_journal_page_first              4490
_journal_paper_doi               10.1039/C4SC01769B
_journal_volume                  5
_journal_year                    2014
_chemical_formula_moiety         'C40 H50 S Si2'
_chemical_formula_sum            'C40 H50 S Si2'
_chemical_formula_weight         619.04
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2013-05-19 # Formatted by publCIF
;
_cell_angle_alpha                90.00
_cell_angle_beta                 104.724(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.8584(12)
_cell_length_b                   12.3701(8)
_cell_length_c                   15.9959(11)
_cell_measurement_reflns_used    2669
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      67.7
_cell_measurement_theta_min      4.32
_cell_volume                     3609.0(4)
_computing_cell_refinement       'ApexII (Bruker, 2011)'
_computing_data_collection       'ApexII (Bruker, 2011)'
_computing_data_reduction        'ApexII (Bruker, 2011)'
_computing_molecular_graphics    'SHELXL-97 (Sheldrick, 2008)'
_computing_publication_material  'publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'Bruker ApexII'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0481
_diffrn_reflns_av_sigmaI/netI    0.0392
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            11612
_diffrn_reflns_theta_full        65.08
_diffrn_reflns_theta_max         65.08
_diffrn_reflns_theta_min         4.32
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.611
_exptl_absorpt_correction_T_max  0.9383
_exptl_absorpt_correction_T_min  0.5650
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, (Sheldrick 2008)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.139
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1336
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.555
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.096
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.091
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     201
_refine_ls_number_reflns         3024
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.091
_refine_ls_R_factor_all          0.0685
_refine_ls_R_factor_gt           0.0532
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1007P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1386
_refine_ls_wR_factor_ref         0.1511
_reflns_number_gt                2409
_reflns_number_total             3024
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4sc01769b2.cif
_cod_data_source_block           si
_cod_depositor_comments
'Adding full bibliography for 1517099--1517103.cif.'
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1517099