Supramolecular structures formed by 2-aminopyridine derivatives.
Bensemann, Igor; Gdaniec, Maria; Połoński, Tadeusz; New Journal of Chemistry 26 (2002) 448–; doi:10.1039/b108861k

data_7050747
_publ_section_title
;
 Supramolecular structures formed by 2-aminopyridine derivatives.
;
_journal_issue                   4
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              448
_journal_paper_doi               10.1039/b108861k
_journal_volume                  26
_journal_year                    2002
_chemical_formula_sum            'C22 H18 N4'
_chemical_formula_weight         338.40
_chemical_melting_point          233.0(10)
_chemical_name_systematic
; 
N,N'-Bis(2-pyridyl)-4,4'-diaminobiphenyl  
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 104.70(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.761(3)
_cell_length_b                   13.162(3)
_cell_length_c                   18.341(4)
_cell_measurement_reflns_used    35
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      14
_cell_measurement_theta_min      5
_cell_volume                     3446.7(14)
_computing_cell_refinement       'Kuma KM-4 software (Kuma Diffraction, 1991)'
_computing_data_collection       'Kuma KM-4 sofware (Kuma Diffraction, 1991)'
_computing_data_reduction        'Kuma KM-4 software (Kuma Diffraction, 1991)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'KM-4 four-circle diffractometer'
_diffrn_measurement_method       '\w/2\q scan'
_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  0.0592
_diffrn_reflns_av_sigmaI/netI    0.1042
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2810
_diffrn_reflns_theta_max         24.04
_diffrn_reflns_theta_min         2.10
_diffrn_standards_decay_%        <2%
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'pale brown'
_exptl_crystal_density_diffrn    1.304
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1424
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.960
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         2720
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.960
_refine_ls_R_factor_all          0.1665
_refine_ls_R_factor_gt           0.0502
_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^)+(0.0671P)^2^+0.0054P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1157
_refine_ls_wR_factor_ref         0.1346
_reflns_number_gt                1415
_reflns_number_total             2720
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b108861k.txt
_cod_data_source_block           5
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '232-234' was changed to '233.0(10)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1569 2011-02-09 13:29:24Z adriana 
;
_cod_original_cell_volume        3446.7(13)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7050747