2-(4-Aminopyridinio)acetate
Liu, Ge; Acta Crystallographica Section E 65 (2009) o857–; doi:10.1107/S1600536809009258

data_2221339
_publ_section_title
;
 2-(4-Aminopyridinio)acetate
;
_journal_coeditor_code           FB2140
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o857
_journal_paper_doi               10.1107/S1600536809009258
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C7 H8 N2 O2'
_chemical_formula_moiety         'C7 H8 N2 O2'
_chemical_formula_sum            'C7 H8 N2 O2'
_chemical_formula_weight         152.15
_chemical_name_systematic
;
2-(4-Aminopyridinio)acetate
;
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.57(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.9766(18)
_cell_length_b                   9.0555(18)
_cell_length_c                   8.9886(18)
_cell_measurement_reflns_used    5894
_cell_measurement_temperature    293.1
_cell_measurement_theta_max      27.6
_cell_measurement_theta_min      3.3
_cell_volume                     700.3(3)
_computing_cell_refinement       'RAPID-AUTO (Rigaku, 1998)'
_computing_data_collection       'RAPID-AUTO (Rigaku, 1998)'
_computing_data_reduction        'CrystalStructure (Rigaku/MSC, 2002)'
_computing_molecular_graphics
'SHELXTL (Sheldrick, 2008) and Mercury (Macrae <i>et al.</i>,  2006)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID-S'
_diffrn_measurement_method       \w
_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  0.0522
_diffrn_reflns_av_sigmaI/netI    0.0435
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            7228
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.26
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.443
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             320
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.168
_refine_diff_density_min         -0.204
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.113
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_constraints    26
_refine_ls_number_parameters     106
_refine_ls_number_reflns         1599
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.113
_refine_ls_R_factor_all          0.0861
_refine_ls_R_factor_gt           0.0549
_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^)+(0.0391P)^2^+0.2309P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1073
_refine_ls_wR_factor_ref         0.1168
_reflns_number_gt                1123
_reflns_number_total             1599
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fb2140.cif
_cod_data_source_block           I
_cod_original_cell_volume        700.3(2)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2221339
_cod_database_fobs_code          2221339