Refinement of crystal structure of 2,6-bis(N-methylbenzimidazol-2-yl)pyridine at 153 K, C21H17N5
Huilu Wu; Xingcai Huang; Jingkun Yuan; Jian Ding; Ruirui Yun; Zeitschrift für Kristallographie - New Crystal Structures 224 (2009) 419–; doi:

data_8102463
_publ_section_title
;
 Refinement of crystal structure of
 2,6-bis(N-methylbenzimidazol-2-yl)pyridine at 153 K, C21H17N5
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_journal_issue                   3
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              419
_journal_volume                  224
_journal_year                    2009
_chemical_formula_sum            'C21 H17 N5'
_chemical_formula_weight         339.40
_chemical_melting_point_gt       194
_chemical_melting_point_lt       196
_chemical_name_systematic
; 
2,6-bis(<i>N</i>-methylbenzimidazol-2-yl)pyridine
;
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.1415(16)
_cell_length_b                   9.1274(8)
_cell_length_c                   20.0652(19)
_cell_measurement_reflns_used    3795
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      3.03
_cell_volume                     3322.5(5)
_computing_cell_refinement       'Rapid Auto Version 3.0 (Rigaku 2004)'
_computing_data_collection       'Rapid Auto Version 3.0 (Rigaku 2004)'
_computing_data_reduction        'Rapid Auto Version 3.0 (Rigaku 2004)'
_computing_molecular_graphics    'SHELXTL 5.1 (Bruker AXS, 2000)'
_computing_publication_material  'SHELXTL 5.1 (Bruker AXS, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku Rapid'
_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  0.0244
_diffrn_reflns_av_sigmaI/netI    0.0154
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            27617
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.03
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9735
_exptl_absorpt_correction_T_min  0.9496
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Higashi, T. (1995). Program for 
Absorption Correction. Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1424
_exptl_crystal_size_max          0.62
_exptl_crystal_size_mid          0.57
_exptl_crystal_size_min          0.32
_refine_diff_density_max         0.251
_refine_diff_density_min         -0.214
_refine_diff_density_rms         0.035
_refine_ls_extinction_coef       0.0068(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         3795
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0378
_refine_ls_R_factor_gt           0.0343
_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^)+(0.0516P)^2^+0.8164P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0925
_refine_ls_wR_factor_ref         0.0950
_reflns_number_gt                3423
_reflns_number_total             3795
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1267-2645.cff
_cod_data_source_block           g0550
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 1555 2011-01-17 13:19:09Z saulius 
;
_cod_original_sg_symbol_H-M      Pbcn
_cod_database_code               8102463