2,3-Diphenylquinoxaline
Rajnikant; Dinesh; Madhukar Baburao Deshmukh; Sunil Jadhav; Pryinka Kanwal; Acta Crystallographica Section E 62 (2006) o2356–o2357; doi:10.1107/S1600536806017776

data_2209165
_publ_section_title
;
 2,3-Diphenylquinoxaline
;
_journal_coeditor_code           FL2028
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2356
_journal_page_last               o2357
_journal_paper_doi               10.1107/S1600536806017776
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C20 H14 N2'
_chemical_formula_moiety         'C20 H14 N2'
_chemical_formula_sum            'C20 H14 N2'
_chemical_formula_weight         282.33
_chemical_melting_point          398
_chemical_name_common            2,3-diphenylquinoxaline
_chemical_name_systematic
;
2,3-diphenylquinoxaline
;
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.005(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.0306(2)
_cell_length_b                   10.9269(5)
_cell_length_c                   22.5309(8)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      13.8
_cell_measurement_theta_min      6.5
_cell_volume                     1479.03(10)
_computing_cell_refinement       'CrysAlisRED (Oxford Diffraction, 2003)'
_computing_data_collection       'CrysAlisCCD (Oxford Diffraction, 2003)'
_computing_data_reduction        CrysAlisRED
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material
'PARST95 (Nardelli, 1995) and PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Diffraction CrysAlisCCD'
_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  0.0269
_diffrn_reflns_av_sigmaI/netI    0.0249
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            16180
_diffrn_reflns_theta_full        27.57
_diffrn_reflns_theta_max         27.57
_diffrn_reflns_theta_min         2.60
_diffrn_standards_decay_%        <2
_diffrn_standards_interval_time  60
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.93
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            'Light Yellow'
_exptl_crystal_density_diffrn    1.268
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             592
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.296
_refine_diff_density_min         -0.172
_refine_ls_extinction_coef       0.0092(16)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.125
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         3413
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.125
_refine_ls_R_factor_all          0.0599
_refine_ls_R_factor_gt           0.0437
_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^)+(0.0404P)^2^+0.715P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1070
_refine_ls_wR_factor_ref         0.1117
_reflns_number_gt                2773
_reflns_number_total             3413
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fl2028.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               2209165
_cod_database_fobs_code          2209165