6,8-Diiodo-4-oxo-4<i>H</i>-chromene-3-carbaldehyde
Ishikawa, Yoshinobu; Acta Crystallographica Section E 70 (2014) o536–; doi:10.1107/S1600536814006904

data_2239325
_publ_section_title
;
 6,8-Diiodo-4-oxo-4<i>H</i>-chromene-3-carbaldehyde
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o536
_journal_paper_doi               10.1107/S1600536814006904
_journal_volume                  70
_journal_year                    2014
_chemical_formula_moiety         'C10 H4 I2 O3'
_chemical_formula_sum            'C10 H4 I2 O3'
_chemical_formula_weight         425.95
_chemical_name_systematic
;
6,8-Diiodo-4-oxo-4<i>H</i>-chromene-3-carbaldehyde
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                63.82(3)
_cell_angle_beta                 75.44(3)
_cell_angle_gamma                68.05(4)
_cell_formula_units_Z            2
_cell_length_a                   7.290(3)
_cell_length_b                   8.779(5)
_cell_length_c                   9.767(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    100
_cell_measurement_theta_max      17.12
_cell_measurement_theta_min      15.23
_cell_volume                     517.5(5)
_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    'SIR92 (Altomare <i>et al.</i>, 1994)'
_diffrn_ambient_temperature      100
_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_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0261
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            2933
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.50
_diffrn_standards_decay_%        -1.119
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    6.061
_exptl_absorpt_correction_T_max  0.220
_exptl_absorpt_correction_T_min  0.152
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>, 1968)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.733
_exptl_crystal_description       block
_exptl_crystal_F_000             388.00
_exptl_crystal_size_max          0.480
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.250
_refine_diff_density_max         3.560
_refine_diff_density_min         -3.010
_refine_ls_extinction_coef       0.018(3)
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.234
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2383
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.0509
_refine_ls_shift/su_max          0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0884P)^2^+4.3985P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1471
_reflns_number_gt                2361
_reflns_number_total             2383
_reflns_threshold_expression     F^2^>2\s(F^2^)
_cod_data_source_file            zl2583sup1.cif
_cod_data_source_block           I
_cod_database_code               2239325
_cod_database_fobs_code          2239325