An orthorhombic polymorph of 3,4-diaminobenzonitrile
Geiger, David K.; Parsons, Dylan E.; Acta Crystallographica Section E 69 (2013) o658–; doi:10.1107/S1600536813008489

data_2237990
_publ_section_title
;
 An orthorhombic polymorph of 3,4-diaminobenzonitrile
;
_journal_coeditor_code           QK2056
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o658
_journal_paper_doi               10.1107/S1600536813008489
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C7 H7 N3'
_chemical_formula_moiety         'C7 H7 N3'
_chemical_formula_sum            'C7 H7 N3'
_chemical_formula_weight         133.16
_chemical_name_common            3,4-diaminobenzonitrile
_chemical_name_systematic
;
3,4-Diaminobenzonitrile
;
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.425(3)
_cell_length_b                   4.5225(8)
_cell_length_c                   8.6167(16)
_cell_measurement_reflns_used    1493
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      24.87
_cell_measurement_theta_min      3.32
_cell_volume                     679.0(2)
_computing_cell_refinement       'SAINT (Bruker, 2010)'
_computing_data_collection       'APEX2 (Bruker, 2010)'
_computing_data_reduction        'SAINT (Bruker, 2010)'
_computing_molecular_graphics
'XSHELL (Bruker, 2010) and Mercury (Macrae <i>et al.</i>, 2008)'
_computing_publication_material  'publCIF (Westrip, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART X2S CCD'
_diffrn_measurement_method       '\w 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  0.0295
_diffrn_reflns_av_sigmaI/netI    0.0195
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            3295
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         3.33
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.84
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2010)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       pyramidal
_exptl_crystal_F_000             280
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.094
_refine_diff_density_min         -0.143
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     103
_refine_ls_number_reflns         652
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0334
_refine_ls_R_factor_gt           0.0303
_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^)+(0.0563P)^2^+0.0095P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0785
_refine_ls_wR_factor_ref         0.0805
_reflns_number_gt                598
_reflns_number_total             652
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            qk2056.cif
_cod_data_source_block           I
_cod_database_code               2237990
_cod_database_fobs_code          2237990