Packing similarities of three isosteric molecules: 4,5-dichlorophthalic anhydride, 4,5-dibromophthalic anhydride and 5,6-dichlorobenzfurazan 1-oxide, including three polymorphs of 5,6-dichlorobenzfurazan 1-oxide
Ojala, Charles R.; Ojala, William H.; Britton, Doyle; Gougoutas, J. Z.; Acta Crystallographica Section B 55 (1999) 530–542; doi:10.1107/S0108768199000348

data_2002936
_publ_section_title
;
 Packing similarities of three isosteric molecules:
 4,5-dichlorophthalic anhydride, 4,5-dibromophthalic anhydride and
 5,6-dichlorobenzfurazan 1-oxide, including three polymorphs of
 5,6-dichlorobenzfurazan 1-oxide
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              530
_journal_page_last               542
_journal_paper_doi               10.1107/S0108768199000348
_journal_volume                  55
_journal_year                    1999
_chemical_formula_sum            'C6 H2 Cl2 N2 O2'
_chemical_formula_weight         205.00
_chemical_name_systematic
;
 5,6-dichlorobenzfurazan-1-oxide
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_audit_creation_method           'SHELXL plus manual entry'
_cell_angle_alpha                90.00
_cell_angle_beta                 95.315(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.22330(10)
_cell_length_b                   9.0549(3)
_cell_length_c                   11.5700(4)
_cell_measurement_reflns_used    1656
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2
_cell_volume                     753.50(4)
_diffrn_ambient_temperature      173(2)
_diffrn_measurement_device       SMART
_diffrn_measurement_method       \w
_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  0.024
_diffrn_reflns_av_sigmaI/netI    0.028
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3292
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         3.54
_diffrn_standards_decay_%        <1%
_diffrn_standards_interval_time  360
_diffrn_standards_number
;
 the first 150 reflections collected were re-collected at the end of
the data collection
;
_exptl_absorpt_coefficient_mu    0.812
_exptl_absorpt_correction_T_max  0.85
_exptl_absorpt_correction_T_min  0.67
_exptl_absorpt_correction_type   'SADABS (Sheldrick,1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.807
_exptl_crystal_density_meas      ?
_exptl_crystal_description       'thick plate'
_exptl_crystal_F_000             408
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.18
_refine_diff_density_min         -0.21
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.116
_refine_ls_goodness_of_fit_obs   1.151
_refine_ls_hydrogen_treatment    'idealized positions'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         659
_refine_ls_number_restraints     33
_refine_ls_restrained_S_all      1.117
_refine_ls_restrained_S_obs      1.150
_refine_ls_R_factor_all          0.030
_refine_ls_R_factor_obs          0.027
_refine_ls_shift/esd_max         0.02
_refine_ls_shift/esd_mean        0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.043P)^2^+0.199P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.073
_refine_ls_wR_factor_obs         0.071
_reflns_number_observed          594
_reflns_number_total             659
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            bk0061.cif
_cod_data_source_block           Clt
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.043P)^2^+0.199P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.043P)^2^+0.199P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_database_code               2002936
_cod_database_fobs_code          2002936