<i>rac</i>-2-Hydroxy-2-(2-oxocyclopentyl)-1<i>H</i>-indene-1,3(2<i>H</i>)-dione
Sundar, J. Kalyana; Maharani, S.; Kumar, R. Ranjith; Natarajan, S.; Suresh, J.; Lakshman, P. L. Nilantha; Acta Crystallographica Section E 66 (2010) o2967–; doi:10.1107/S1600536810042856

data_2227458
_publ_section_title
;
 <i>rac</i>-2-Hydroxy-2-(2-oxocyclopentyl)-1<i>H</i>-indene-1,3(2<i>H</i>)-dione
;
_journal_coeditor_code           GK2301
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2967
_journal_paper_doi               10.1107/S1600536810042856
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C14 H12 O4'
_chemical_formula_moiety         'C14 H12 O4'
_chemical_formula_sum            'C14 H12 O4'
_chemical_formula_weight         244.24
_chemical_name_systematic
;
<i>rac</i>-2-Hydroxy-2-(2-oxocyclopentyl)-1<i>H</i>-indene-1,3(2<i>H</i>)-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                66.95(3)
_cell_angle_beta                 74.36(2)
_cell_angle_gamma                68.50(3)
_cell_formula_units_Z            2
_cell_length_a                   8.044(3)
_cell_length_b                   8.404(4)
_cell_length_c                   10.239(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2
_cell_volume                     586.1(4)
_computing_cell_refinement       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_collection       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1996)'
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Nonius MACH3'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0161
_diffrn_reflns_av_sigmaI/netI    0.0106
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2534
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.9810
_exptl_absorpt_correction_T_min  0.9740
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>, 1968)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.384
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             256
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.234
_refine_ls_extinction_coef       0.059(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         2054
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0405
_refine_ls_R_factor_gt           0.0376
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0487P)^2^+0.2034P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1015
_refine_ls_wR_factor_ref         0.1040
_reflns_number_gt                1886
_reflns_number_total             2054
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            gk2301.cif
_cod_data_source_block           I
_cod_database_code               2227458
_cod_database_fobs_code          2227458