2-Amino-5-methylpyridinium 2-carboxybenzoate
Hemamalini, Madhukar; Fun, Hoong-Kun; Acta Crystallographica Section E 66 (2010) o2192–o2193; doi:10.1107/S160053681003000X

data_2228082
_publ_section_title
;
 2-Amino-5-methylpyridinium 2-carboxybenzoate
;
_journal_coeditor_code           WN2402
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2192
_journal_page_last               o2193
_journal_paper_doi               10.1107/S160053681003000X
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C6 H9 N2 +, C8 H5 O4 -'
_chemical_formula_moiety         'C6 H9 N2 +, C8 H5 O4 -'
_chemical_formula_sum            'C14 H14 N2 O4'
_chemical_formula_weight         274.27
_chemical_name_common
;
2-amino-5-methylpyridinium hydrogen phthalate
;
_chemical_name_systematic
;
2-Amino-5-methylpyridinium 2-carboxybenzoate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/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                 101.540(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.3853(2)
_cell_length_b                   8.8203(2)
_cell_length_c                   13.4617(3)
_cell_measurement_reflns_used    3124
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      28.57
_cell_measurement_theta_min      2.62
_cell_volume                     1324.52(5)
_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      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type
;
Bruker 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  0.0276
_diffrn_reflns_av_sigmaI/netI    0.0248
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            12332
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.62
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.9797
_exptl_absorpt_correction_T_min  0.9533
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blcok
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.189
_refine_diff_density_min         -0.138
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         3049
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0776
_refine_ls_R_factor_gt           0.0489
_refine_ls_shift/su_max_lt       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^)+(0.0585P)^2^+0.2300P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1184
_refine_ls_wR_factor_ref         0.1355
_reflns_number_gt                2054
_reflns_number_total             3049
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            wn2402.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2228082
_cod_database_fobs_code          2228082