3,4-Diaminopyridinium 2-carboxy-4,6-dinitrophenolate
Hemamalini, Madhukar; Fun, Hoong-Kun; Acta Crystallographica Section E 66 (2010) o2747–; doi:10.1107/S1600536810038936

data_2227551
_publ_section_title
;
 3,4-Diaminopyridinium 2-carboxy-4,6-dinitrophenolate
;
_journal_coeditor_code           HB5660
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2747
_journal_paper_doi               10.1107/S1600536810038936
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C5 H8 N3 +, C7 H3 N2 O7 -'
_chemical_formula_moiety         'C5 H8 N3 +, C7 H3 N2 O7 -'
_chemical_formula_sum            'C12 H11 N5 O7'
_chemical_formula_weight         337.26
_chemical_name_systematic
;
3,4-Diaminopyridinium 2-carboxy-4,6-dinitrophenolate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 98.204(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.1187(4)
_cell_length_b                   11.3569(5)
_cell_length_c                   13.1343(6)
_cell_measurement_reflns_used    2307
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      28.61
_cell_measurement_theta_min      2.38
_cell_volume                     1346.27(10)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
'SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.00(10)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type
;
Bruker SMART APEXII CCD area-detector
;
_diffrn_measurement_method       '\f and \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  0.0637
_diffrn_reflns_av_sigmaI/netI    0.0656
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            10195
_diffrn_reflns_theta_full        26.50
_diffrn_reflns_theta_max         26.50
_diffrn_reflns_theta_min         2.26
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.140
_exptl_absorpt_correction_T_max  0.9863
_exptl_absorpt_correction_T_min  0.9309
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2009)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.664
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.456
_refine_diff_density_min         -0.282
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.117
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         2785
_refine_ls_number_restraints     526
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.1047
_refine_ls_R_factor_gt           0.0702
_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^)+(0.0439P)^2^+2.4565P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1486
_refine_ls_wR_factor_ref         0.1622
_reflns_number_gt                1979
_reflns_number_total             2785
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb5660.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2227551
_cod_database_fobs_code          2227551