<i>N</i>^1^,<i>N</i>^2^-Bis(2-pyridyl)formamidine
Wu, Chia-Jun; Su, Chang-Wei; Yeh, Chun-Wei; Chen, Jhy-Der; Wang, Ju-Chun; Acta Crystallographica Section E 65 (2009) o536–; doi:10.1107/S1600536809004851

data_2221147
_publ_section_title
;
 <i>N</i>^1^,<i>N</i>^2^-Bis(2-pyridyl)formamidine
;
_journal_coeditor_code           NC2134
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o536
_journal_paper_doi               10.1107/S1600536809004851
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C11 H10 N4'
_chemical_formula_moiety         'C11 H10 N4'
_chemical_formula_sum            'C11 H10 N4'
_chemical_formula_weight         198.23
_chemical_name_systematic
;
<i>N</i>^1^,<i>N</i>^2^-Bis(2-pyridyl)formamidine
;
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yac'
_symmetry_space_group_name_H-M   'P 1 2/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                 98.725(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.0411(14)
_cell_length_b                   4.3904(5)
_cell_length_c                   20.789(3)
_cell_measurement_reflns_used    1493
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      25.07
_cell_measurement_theta_min      1.98
_cell_volume                     996.1(2)
_computing_cell_refinement       'SAINT (Bruker, 1997)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction
'SAINT (Bruker, 1997) and SHELXTL (Sheldrick, 2008)'
_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      298(2)
_diffrn_measured_fraction_theta_full 0.960
_diffrn_measured_fraction_theta_max 0.960
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_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  0.0408
_diffrn_reflns_av_sigmaI/netI    0.0433
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            3628
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         1.98
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.995
_exptl_absorpt_correction_T_min  0.983
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(<i>SADABS</i>; Bruker, 1997)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.322
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Column
_exptl_crystal_F_000             416
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.138
_refine_diff_density_min         -0.193
_refine_ls_extinction_coef       0.024(4)
_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   1.133
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     141
_refine_ls_number_reflns         1697
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.133
_refine_ls_R_factor_all          0.0866
_refine_ls_R_factor_gt           0.0587
_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^)+(0.0509P)^2^+0.3516P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1250
_refine_ls_wR_factor_ref         0.1426
_reflns_number_gt                1251
_reflns_number_total             1697
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            nc2134.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 2/n'
_cod_database_code               2221147
_cod_database_fobs_code          2221147