4,5-Dimethyl-1,2-bis(pyridine-3-carboxamido)benzene
Kwak, Han; Park, Chi-Ho; Kim, Pan-Gi; Kim, Cheal; Kim, Youngmee; Acta Crystallographica Section E 63 (2007) o4104–o4105; doi:10.1107/S1600536807044492

data_2215587
_publ_section_title
;
 4,5-Dimethyl-1,2-bis(pyridine-3-carboxamido)benzene
;
_journal_coeditor_code           LH2501
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o4104
_journal_page_last               o4105
_journal_paper_doi               10.1107/S1600536807044492
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C20 H18 N4 O2'
_chemical_formula_moiety         'C20 H18 N4 O2'
_chemical_formula_sum            'C20 H18 N4 O2'
_chemical_formula_weight         346.38
_chemical_name_systematic
;
4,5-Dimethyl-1,2-bis(pyridine-3-carboxamido)benzene
;
_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           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 101.467(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.086(2)
_cell_length_b                   17.960(5)
_cell_length_c                   12.135(3)
_cell_measurement_reflns_used    1519
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      21.57
_cell_measurement_theta_min      2.27
_cell_volume                     1727.1(8)
_computing_cell_refinement       'SMART (Bruker, 1997)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        'SAINT (Bruker, 1997)'
_computing_molecular_graphics    'SHELXTL (Bruker, 1998)'
_computing_publication_material  'SHELXTL (Bruker, 1998)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD'
_diffrn_measurement_method       '\f and \w'
_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  0.0304
_diffrn_reflns_av_sigmaI/netI    0.0537
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            9503
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.982
_exptl_absorpt_correction_T_min  0.978
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.180
_refine_diff_density_min         -0.155
_refine_ls_extinction_coef       0.0233(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         3391
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0689
_refine_ls_R_factor_gt           0.0429
_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^)+(0.0396P)^2^+0.2189P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1010
_refine_ls_wR_factor_ref         0.1108
_reflns_number_gt                2300
_reflns_number_total             3391
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh2501.cif
_cod_data_source_block           I
_cod_original_cell_volume        1727.2(8)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2215587
_cod_database_fobs_code          2215587