2-Amino-4-methylpyridinium 4-nitrobenzoate
Hemamalini, Madhukar; Fun, Hoong-Kun; Acta Crystallographica Section E 66 (2010) o335–; doi:10.1107/S1600536810000693

data_2224912
_publ_section_title
;
 2-Amino-4-methylpyridinium 4-nitrobenzoate
;
_journal_coeditor_code           CI5013
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o335
_journal_paper_doi               10.1107/S1600536810000693
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C6 H9 N2 +, C7 H4 N O4 -'
_chemical_formula_moiety         'C6 H9 N2 +, C7 H4 N O4 -'
_chemical_formula_sum            'C13 H13 N3 O4'
_chemical_formula_weight         275.26
_chemical_name_systematic
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2-Amino-4-methylpyridinium 4-nitrobenzoate
;
_space_group_IT_number           7
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P -2yc'
_symmetry_space_group_name_H-M   'P 1 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                 92.1940(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.5267(2)
_cell_length_b                   5.01870(10)
_cell_length_c                   12.2436(3)
_cell_measurement_reflns_used    3965
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      34.79
_cell_measurement_theta_min      3.33
_cell_volume                     646.36(2)
_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  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.00(10)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type
;
Bruker SMART APEXII CCD area-detector diffractometer
;
_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  0.0286
_diffrn_reflns_av_sigmaI/netI    0.0343
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            10644
_diffrn_reflns_theta_full        35.04
_diffrn_reflns_theta_max         35.04
_diffrn_reflns_theta_min         1.94
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_T_max  0.9828
_exptl_absorpt_correction_T_min  0.9493
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.414
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             288
_exptl_crystal_size_max          0.491
_exptl_crystal_size_mid          0.282
_exptl_crystal_size_min          0.162
_refine_diff_density_max         0.439
_refine_diff_density_min         -0.296
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         2841
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0583
_refine_ls_R_factor_gt           0.0468
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0808P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1171
_refine_ls_wR_factor_ref         0.1244
_reflns_number_gt                2390
_reflns_number_total             2841
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ci5013.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 c'
_cod_database_code               2224912
_cod_database_fobs_code          2224912