Bitrialkylsilylethynyl thienoacenes: synthesis, molecular conformation and crystal packing, and their field-effect properties
Weifeng Zhang; Ji Zhang; Xiangyang Chen; Zupan Mao; Xiaodong Xie; Liping Wang; Yi Liao; Gui Yu; Yunqi Liu; Daoben Zhu; Journal of Materials Chemistry C 1 (2012) 6403–6410; doi:10.1039/C3TC31421A

data_7233522
_publ_section_title
;
 Bitrialkylsilylethynyl thienoacenes: synthesis, molecular conformation
 and crystal packing, and their field-effect properties
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              6403
_journal_page_last               6410
_journal_paper_doi               10.1039/C3TC31421A
_journal_volume                  1
_journal_year                    2012
_chemical_formula_moiety         'C42 H52 S Si2'
_chemical_formula_sum            'C42 H52 S Si2'
_chemical_formula_weight         645.08
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.907(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.545(2)
_cell_length_b                   17.738(4)
_cell_length_c                   25.019(6)
_cell_measurement_reflns_used    10912
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4773
_cell_measurement_theta_min      1.4073
_cell_volume                     3791.7(15)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics
;
 Mercury: visualization and analysis of crystal structures, C. F. Macrae,
 P. R. Edgington, P. McCabe, E. Pidcock, G. P. Shields, R. Taylor,
 M. Towler and J. van de Streek, J. Appl. Cryst., 39, 453-457, 2006.
;
_computing_publication_material  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELX-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0632
_diffrn_reflns_av_sigmaI/netI    0.0693
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            25390
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         1.63
_exptl_absorpt_coefficient_mu    0.176
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7292
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.130
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.400
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.234
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     418
_refine_ls_number_reflns         8638
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.234
_refine_ls_R_factor_all          0.1168
_refine_ls_R_factor_gt           0.0985
_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^)+(0.0342P)^2^+4.4420P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1742
_refine_ls_wR_factor_ref         0.1834
_reflns_number_gt                7329
_reflns_number_total             8638
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000003.cif
_cod_data_source_block           PCOD1000003
_cod_original_cell_volume        3791.9(16)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7233522