3a,8a-Dihydroxy-1,3,3a,8a-tetrahydroindeno[1,2-<i>d</i>]imidazole-2,8-dione
Ghalib, Raza Murad; Hashim, Rokiah; Mehdi, Sayed Hasan; Quah, Ching Kheng; Fun, Hoong-Kun; Acta Crystallographica Section E 67 (2011) o1525–; doi:10.1107/S1600536811019039

data_2230378
_publ_section_title
;
 3a,8a-Dihydroxy-1,3,3a,8a-tetrahydroindeno[1,2-<i>d</i>]imidazole-2,8-dione
;
_journal_coeditor_code           IS2712
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1525
_journal_paper_doi               10.1107/S1600536811019039
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C10 H8 N2 O4'
_chemical_formula_moiety         'C10 H8 N2 O4'
_chemical_formula_sum            'C10 H8 N2 O4'
_chemical_formula_weight         220.18
_chemical_name_systematic
;
3a,8a-Dihydroxy-1,3,3a,8a-tetrahydroindeno[1,2-<i>d</i>]imidazole-2,8-dione
;
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                94.2580(10)
_cell_angle_beta                 102.7730(10)
_cell_angle_gamma                93.7250(10)
_cell_formula_units_Z            2
_cell_length_a                   6.7914(2)
_cell_length_b                   7.3201(2)
_cell_length_c                   9.5006(3)
_cell_measurement_reflns_used    2749
_cell_measurement_temperature    296
_cell_measurement_theta_max      27.55
_cell_measurement_theta_min      3.09
_cell_volume                     457.74(2)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      296
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type
;
Bruker SMART APEXII CCD area-detector
;
_diffrn_measurement_method       '\f and \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  0.0224
_diffrn_reflns_av_sigmaI/netI    0.0260
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            6684
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.21
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.126
_exptl_absorpt_correction_T_max  0.9938
_exptl_absorpt_correction_T_min  0.9523
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(<i>SADABS</i>; Bruker, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.598
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             228
_exptl_crystal_size_max          0.391
_exptl_crystal_size_mid          0.153
_exptl_crystal_size_min          0.049
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.227
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     177
_refine_ls_number_reflns         2081
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0559
_refine_ls_R_factor_gt           0.0395
_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^)+(0.0511P)^2^+0.1396P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0982
_refine_ls_wR_factor_ref         0.1095
_reflns_number_gt                1634
_reflns_number_total             2081
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            is2712.cif
_cod_data_source_block           I
_cod_database_code               2230378
_cod_database_fobs_code          2230378