3-Benzoylmethylene-1-methyl-3,4-dihydroquinoxalin-2(1<i>H</i>)-one
Yun Liu; Zhi-Feng Lu; Yong-Miao Shen; Jian-Hua Xu; Acta Crystallographica Section E 61 (2005) o2753–o2754; doi:10.1107/S1600536805023664

data_2206513
_publ_section_title
;
 3-Benzoylmethylene-1-methyl-3,4-dihydroquinoxalin-2(1<i>H</i>)-one
;
_journal_coeditor_code           OB6546
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2753
_journal_page_last               o2754
_journal_paper_doi               10.1107/S1600536805023664
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C17 H14 N2 O2'
_chemical_formula_moiety         'C17 H14 N2 O2'
_chemical_formula_sum            'C17 H14 N2 O2'
_chemical_formula_weight         278.30
_chemical_melting_point          455.2
_chemical_name_systematic
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3-Benzoylmethylene-1-methyl-3,4-dihydroquinoxalin-2(1H)-one
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 104.36(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.6050(19)
_cell_length_b                   10.767(2)
_cell_length_c                   13.374(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    288(2)
_cell_measurement_theta_max      13
_cell_measurement_theta_min      10
_cell_volume                     1339.9(5)
_computing_cell_refinement       'CAD-4 Software'
_computing_data_collection       'CAD-4 Software (Enraf--Nonius, 1989)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and PLATON (Spek, 2003)'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      288(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Enraf--Nonius CAD-4'
_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     0.71073
_diffrn_reflns_av_R_equivalents  0.0681
_diffrn_reflns_av_sigmaI/netI    0.0456
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            2510
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.36
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.975
_exptl_absorpt_correction_T_min  0.946
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(XCAD4; Harms & Wocadlo, 1995)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.380
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.164
_refine_diff_density_min         -0.168
_refine_ls_extinction_coef       0.0139(12)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXTL
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     191
_refine_ls_number_reflns         2363
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.1004
_refine_ls_R_factor_gt           0.0457
_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^)+(0.03P)^2^+0.49P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0958
_refine_ls_wR_factor_ref         0.1074
_reflns_number_gt                1356
_reflns_number_total             2363
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob6546.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2206513
_cod_database_fobs_code          2206513