Redetermination of 2,2'-bithiophene
Chaloner, P. A.; Gunatunga, S. R.; Hitchcock, P. B.; Acta Crystallographica Section C 50 (1994) 1941–1942; doi:10.1107/S0108270194001149

data_2010281
_publ_section_title
;
 Redetermination of 2,2'-bithiophene
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1941
_journal_page_last               1942
_journal_paper_doi               10.1107/S0108270194001149
_journal_volume                  50
_journal_year                    1994
_chemical_formula_moiety         'C8 H6 S2'
_chemical_formula_sum            'C8 H6 S2'
_chemical_formula_weight         166.3
_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_type_scat_source           'Enraf-Nonius MolEN programs (Fair, 1990)'
_cell_angle_alpha                90.
_cell_angle_beta                 107.07(2)
_cell_angle_gamma                90.
_cell_formula_units_Z            2
_cell_length_a                   7.873(3)
_cell_length_b                   5.771(2)
_cell_length_c                   8.813(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    173
_cell_measurement_theta_max      10
_cell_measurement_theta_min      7
_cell_volume                     382.8(2)
_diffrn_measurement_device       'Enraf-Nonius CAD-4'
_diffrn_measurement_method       \q-2\q
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.02
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            1279
_diffrn_reflns_theta_max         30
_diffrn_standards_decay_%        -0.5
_diffrn_standards_interval_time  60
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.58
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.44
_exptl_crystal_description       tablets
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.42
_refine_diff_density_min         -0.65
_refine_ls_goodness_of_fit_obs   2.8
_refine_ls_hydrogen_treatment    refall
_refine_ls_number_parameters     58
_refine_ls_number_reflns         972
_refine_ls_R_factor_obs          0.056
_refine_ls_shift/esd_max         0.03
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
'w = \s^-2^(F); \Sw(|F~o~|-|F~c~|)^2^ minimized'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_obs         0.072
_reflns_number_observed          972
_reflns_number_total             1214
_reflns_observed_criterion       F^2^>2\s(F^2^)
_cod_data_source_file            ha1074.cif
_cod_data_source_block           ha1074a
_cod_depositor_comments
;
 Changing the space group from '-P 1' to '-P 2ybc' after consulting the
 original publication. All related space group information was changed
 accordingly.

 Antanas Vaitkus,
 2017-07-05

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value ' w = \s^-2^(F);
\Sw(|F~o~|-|F~c~|)^2^ minimized' was changed to 'calc'. New tag
'_refine_ls_weighting_details' was created. The value of the new tag
was set to 'w = \s^-2^(F); \Sw(|F~o~|-|F~c~|)^2^ minimized'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        382.8
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2010281