5,6-Dimethyl-4-phenyl-2<i>H</i>-pyran-2-one
Xu, Hai-Yun; Guo, Sheng-Hai; Li, Kun; Fan, Xue-Sen; Acta Crystallographica Section E 68 (2012) o1131–; doi:10.1107/S1600536812011233

data_2234438
_publ_section_title
;
 5,6-Dimethyl-4-phenyl-2<i>H</i>-pyran-2-one
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1131
_journal_paper_doi               10.1107/S1600536812011233
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C13 H12 O2'
_chemical_formula_moiety         'C13 H12 O2'
_chemical_formula_sum            'C13 H12 O2'
_chemical_formula_weight         200.23
_chemical_name_systematic
;
5,6-Dimethyl-4-phenyl-2<i>H</i>-pyran-2-one
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 97.183(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.654(3)
_cell_length_b                   6.967(3)
_cell_length_c                   20.629(8)
_cell_measurement_reflns_used    2249
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.94
_cell_measurement_theta_min      2.68
_cell_volume                     1091.4(8)
_computing_cell_refinement       'SAINT (Bruker, 2007)'
_computing_data_collection       'SMART (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0205
_diffrn_reflns_av_sigmaI/netI    0.0171
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            7794
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.68
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9776
_exptl_absorpt_correction_T_min  0.9690
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.219
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             424
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.37
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.146
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         2032
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0594
_refine_ls_R_factor_gt           0.0448
_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^)+(0.0659P)^2^+0.2202P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1252
_refine_ls_wR_factor_ref         0.1369
_reflns_number_gt                1530
_reflns_number_total             2032
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            vm2163.cif
_cod_data_source_block           I
_cod_original_cell_volume        1091.4(7)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2234438
_cod_database_fobs_code          2234438