3-(4-Methoxyphenyl)pyrido[2,3-<i>b</i>]pyrazine
Wang, Cui-ping; Yan, Jing-bo; Chi, Hai-Jun; Dong, Yan; Zhang, Zhi-qiang; Acta Crystallographica Section E 66 (2010) o2650–; doi:10.1107/S1600536810037943

data_2227355
_publ_section_title
;
 3-(4-Methoxyphenyl)pyrido[2,3-<i>b</i>]pyrazine
;
_journal_coeditor_code           CV2765
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2650
_journal_paper_doi               10.1107/S1600536810037943
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C14 H11 N3 O'
_chemical_formula_moiety         'C14 H11 N3 O'
_chemical_formula_sum            'C14 H11 N3 O'
_chemical_formula_weight         237.26
_chemical_melting_point          428
_chemical_name_systematic
;
3-(4-Methoxyphenyl)pyrido[2,3-<i>b</i>]pyrazine
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 99.31(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.4486(13)
_cell_length_b                   7.3265(15)
_cell_length_c                   24.216(6)
_cell_measurement_reflns_used    3162
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.890
_cell_measurement_theta_min      2.557
_cell_volume                     1129.0(4)
_computing_cell_refinement       'CrystalClear (Rigaku/MSC, 2005)'
_computing_data_collection       'CrystalClear (Rigaku/MSC, 2005)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC, 2005)'
_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      153(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Rigaku Saturn CCD area-detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  multilayer
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0342
_diffrn_reflns_av_sigmaI/netI    0.0309
_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       31
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            9650
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.85
_diffrn_reflns_theta_min         1.70
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.9891
_exptl_absorpt_correction_T_min  0.9819
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrystalClear; Rigaku/MSC, 2005)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.396
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             496
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.391
_refine_diff_density_min         -0.266
_refine_ls_extinction_coef       0.194(16)
_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   1.088
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     165
_refine_ls_number_reflns         2677
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_R_factor_all          0.0579
_refine_ls_R_factor_gt           0.0493
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0916P)^2^+0.0926P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1368
_refine_ls_wR_factor_ref         0.1462
_reflns_number_gt                2221
_reflns_number_total             2677
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            cv2765.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2227355
_cod_database_fobs_code          2227355