4,7-Diiodo-2,1,3-benzothiadiazole and 7,7'-diiodo-4,4'-bi(2,1,3-benzothiadiazole)
Tomura, Masaaki; Akhtaruzzaman, Md.; Suzuki, Kazuharu; Yamashita, Yoshiro; Acta Crystallographica Section C 58 (2002) o373–o375; doi:10.1107/S0108270102008296

data_2012843
_publ_section_title
;
 4,7-Diiodo-2,1,3-benzothiadiazole and
 7,7'-diiodo-4,4'-bi(2,1,3-benzothiadiazole)
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o373
_journal_page_last               o375
_journal_paper_doi               10.1107/S0108270102008296
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         'C6 H2 I2 N2 S'
_chemical_formula_sum            'C6 H2 I2 N2 S'
_chemical_formula_weight         387.96
_chemical_name_systematic
;
4,7-diiodo-2,1,3-benzothiadiazole
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 90.47(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.0515(17)
_cell_length_b                   18.2104(12)
_cell_length_c                   4.3441(11)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      14.96
_cell_measurement_theta_min      14.70
_cell_volume                     874.2(3)
_computing_cell_refinement       'MSC/AFC Diffractometer Control Software'
_computing_data_collection
;
MSC/AFC Diffractometer Control Software (Molecular Structure Corporation,
1988)
;
_computing_data_reduction
'TEXSAN (Molecular Structure Corporation & Rigaku Corporation, 2000)'
_computing_molecular_graphics    'ORTEP-III (Burnett & Johnson, 1996)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku AFC-7R'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  'graphite monochromator'
_diffrn_radiation_source         'Rigaku rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.018
_diffrn_reflns_av_sigmaI/netI    0.010
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            2110
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.16
_diffrn_standards_decay_%        0.15
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    7.367
_exptl_absorpt_correction_T_max  0.479
_exptl_absorpt_correction_T_min  0.109
_exptl_absorpt_correction_type   '\y scan'
_exptl_absorpt_process_details   '(North et al., 1968)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    2.948
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.51
_refine_diff_density_min         -0.50
_refine_ls_extinction_coef       0.00185(18)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   0.963
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     101
_refine_ls_number_reflns         2014
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.963
_refine_ls_R_factor_all          0.026
_refine_ls_R_factor_gt           0.019
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0270P)^2^+2.4993P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.050
_refine_ls_wR_factor_ref         0.055
_reflns_number_gt                1763
_reflns_number_total             2014
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ta1368.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/a'
_cod_database_code               2012843
_cod_database_fobs_code          2012843