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_7233521
_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_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 93.260(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.241(2)
_cell_length_b                   15.168(3)
_cell_length_c                   20.461(4)
_cell_measurement_reflns_used    12450
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4841
_cell_measurement_theta_min      1.3425
_cell_volume                     3792.9(12)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
olex2.refine (L.J. Bourhis, O.V. Dolomanov, R.J. Gildea, J.A.K. Howard,
H. Puschmann, in preparation, 2011)
;
_computing_structure_solution    'SHELX-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      446(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_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0547
_diffrn_reflns_av_unetI/netI     0.0460
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            33167
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.69
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.176
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7511
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            orange
_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          0.24
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.697
_refine_diff_density_min         -0.374
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.231
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     418
_refine_ls_number_reflns         8672
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.231
_refine_ls_R_factor_all          0.0896
_refine_ls_R_factor_gt           0.0812
_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^)+(0.0387P)^2^+3.3127P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1584
_refine_ls_wR_factor_ref         0.1628
_reflns_number_gt                7969
_reflns_number_total             8672
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000002.cif
_cod_data_source_block           PCOD1000002
_cod_original_cell_volume        3793.0(12)
_cod_database_code               7233521