6-Chloro-8-nitro-4-oxo-4<i>H</i>-chromene-3-carbaldehyde
Ishikawa, Yoshinobu; Acta Crystallographica Section E 70 (2014) o547–; doi:10.1107/S1600536814007788

data_2239334
_publ_section_title
;
 6-Chloro-8-nitro-4-oxo-4<i>H</i>-chromene-3-carbaldehyde
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o547
_journal_paper_doi               10.1107/S1600536814007788
_journal_volume                  70
_journal_year                    2014
_chemical_formula_iupac          'C10 H4 Cl N O5'
_chemical_formula_moiety         'C10 H4 Cl N O5'
_chemical_formula_sum            'C10 H4 Cl N O5'
_chemical_formula_weight         253.60
_chemical_name_systematic
;
6-Chloro-8-nitro-4-oxo-4<i>H</i>-chromene-3-carbaldehyde
;
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 119.23(3)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            8
_cell_length_a                   18.585(9)
_cell_length_b                   10.4918(17)
_cell_length_c                   11.094(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    100
_cell_measurement_theta_max      17.45
_cell_measurement_theta_min      15.41
_cell_volume                     1887.8(12)
_computing_cell_refinement
'<i>WinAFC Diffractometer Control Software</i> (Rigaku, 1999)'
_computing_data_collection
'<i>WinAFC Diffractometer Control Software</i> (Rigaku, 1999)'
_computing_data_reduction
'<i>WinAFC Diffractometer Control Software</i> (Rigaku, 1999)'
_computing_molecular_graphics    'CrystalStructure (Rigaku, 2010)'
_computing_publication_material  'CrystalStructure (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2008 (Burla <i>et al.</i>, 1989)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku AFC-7R'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0186
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            2588
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.53
_diffrn_standards_decay_%        -0.708
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.414
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.785
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1024.00
_exptl_crystal_size_max          0.380
_exptl_crystal_size_mid          0.220
_exptl_crystal_size_min          0.180
_refine_diff_density_max         0.290
_refine_diff_density_min         -0.380
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     154
_refine_ls_number_reflns         2173
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.0353
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0464P)^2^+3.8081P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0976
_reflns_number_gt                1903
_reflns_number_total             2173
_reflns_threshold_expression     F^2^>2\s(F^2^)
_cod_data_source_file            tk5305sup1.cif
_cod_data_source_block           I
_cod_original_cell_volume        1887.7(12)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2239334
_cod_database_fobs_code          2239334