2,5-Bis(trimethylsilylethynyl)thieno[3,2-<i>b</i>]thiophene
Khan, Muhammad S.; Al-Naamani, Ruqaya S.; Ahrens, Birte; Raithby, Paul R.; Acta Crystallographica Section E 60 (2004) o1202–o1203; doi:10.1107/S160053680401414X

data_2203948
_publ_section_title
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 2,5-Bis(trimethylsilylethynyl)thieno[3,2-<i>b</i>]thiophene
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1202
_journal_page_last               o1203
_journal_paper_doi               10.1107/S160053680401414X
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C16 H20 S2 Si2'
_chemical_formula_moiety         'C16 H20 S2 Si2'
_chemical_formula_sum            'C16 H20 S2 Si2'
_chemical_formula_weight         332.62
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 108.220(9)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   15.173(3)
_cell_length_b                   5.7317(12)
_cell_length_c                   10.9836(18)
_cell_measurement_reflns_used    3713
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      25.028
_cell_measurement_theta_min      2.91
_cell_volume                     907.3(3)
_computing_cell_refinement       'HKL SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction
'HKL DENZO and SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '88 2\% \f and 32 2\% \w'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0215
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            2820
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         3.83
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.415
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.217
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.39
_refine_diff_density_min         -0.255
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     94
_refine_ls_number_reflns         1596
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_gt           0.0365
_refine_ls_shift/su_max          0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0404P)^2^+0.7998P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1004
_reflns_number_gt                1336
_reflns_number_total             1596
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su6114.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2203948
_cod_database_fobs_code          2203948