Crystal structures of <i>N</i>'-aminopyridine-2-carboximidamide and <i>N</i>'-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide
Eya'ane Meva, Francois; Prior, Timothy John; Evans, David John; Mang, Emmanuel Roland; Acta Crystallographica Section E 73 (2017) 1021–1025; doi:10.1107/S2056989017008416

data_2242232
_publ_section_title
;
 Crystal structures of <i>N</i>'-aminopyridine-2-carboximidamide and
 <i>N</i>'-{[1-(pyridin-2-yl)ethylidene]amino}pyridine-2-carboximidamide
;
_journal_coeditor_code           NK2236
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              1021
_journal_page_last               1025
_journal_paper_doi               10.1107/S2056989017008416
_journal_volume                  73
_journal_year                    2017
_chemical_formula_iupac          'C6 H8 N4'
_chemical_formula_moiety         'C6 H8 N4'
_chemical_formula_sum            'C6 H8 N4'
_chemical_formula_weight         136.16
_chemical_name_systematic
;
<i>N</i>'-Aminopyridine-2-carboximidamide
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 91.631(19)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.6955(14)
_cell_length_b                   3.8408(5)
_cell_length_c                   14.592(4)
_cell_measurement_reflns_used    2199
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.55
_cell_measurement_theta_min      5.5
_cell_volume                     319.07(12)
_computing_cell_refinement
;
X-AREA (Stoe & Cie, 2005)
;
_computing_data_collection
;
X-AREA (Stoe & Cie, 2005)
;
_computing_data_reduction
;
scaled and merged with SORTAV (Blessing, 1987, 1989)
;
_computing_publication_material
;
SHELXL2014 (Sheldrick, 2015b)
;
_computing_structure_refinement
;
SHELXL2014 (Sheldrick, 2015b)
;
_computing_structure_solution
;
SHELXT (Sheldrick, 2015a)
;
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device_type  'Stoe IPDS2'
_diffrn_measurement_method       \w-scan
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0792
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            2271
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.268
_diffrn_reflns_theta_min         2.793
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.963
_exptl_absorpt_correction_T_min  0.909
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(SORTAV; Blessing, 1995)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.417
_exptl_crystal_description       block
_exptl_crystal_F_000             144
_exptl_crystal_size_max          0.480
_exptl_crystal_size_mid          0.210
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.299
_refine_diff_density_min         -0.368
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.874
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1407
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      0.870
_refine_ls_R_factor_all          0.1019
_refine_ls_R_factor_gt           0.0720
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1122P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1784
_refine_ls_wR_factor_ref         0.1928
_reflns_number_gt                806
_reflns_number_total             1407
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            nk2236sup1.cif
_cod_data_source_block           1
_cod_original_cell_volume        319.08(12)
_cod_database_code               2242232
_cod_database_fobs_code          2242232
_shelx_estimated_absorpt_t_min   0.956
_shelx_estimated_absorpt_t_max   0.981
_shelx_hkl_checksum              96683
_shelx_res_checksum              81058