Neutral and Zwitterionic Polymorphs of 2-(p-Tolylamino)nicotinic Acid
Nath, Naba K.; Kumar, S. Sudalai; Nangia, Ashwini; Crystal Growth & Design 11 (2011) 4594–; doi:10.1021/cg200853u

data_4501189
_publ_section_title
;
 Neutral and Zwitterionic Polymorphs of 2-(p-Tolylamino)nicotinic Acid
;
_journal_issue                   10
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              4594
_journal_paper_doi               10.1021/cg200853u
_journal_volume                  11
_journal_year                    2011
_chemical_formula_sum            'C13 H12 N2 O2'
_chemical_formula_weight         228.25
_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                 101.860(14)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.038(10)
_cell_length_b                   9.067(8)
_cell_length_c                   11.392(10)
_cell_measurement_reflns_used    4155
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.03
_cell_measurement_theta_min      2.34
_cell_volume                     1115.8(17)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_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  0.0424
_diffrn_reflns_av_sigmaI/netI    0.0313
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            10196
_diffrn_reflns_theta_full        26.04
_diffrn_reflns_theta_max         26.04
_diffrn_reflns_theta_min         2.34
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9815
_exptl_absorpt_correction_T_min  0.9671
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.359
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.514
_refine_diff_density_min         -0.317
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.188
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         2190
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.188
_refine_ls_R_factor_all          0.0648
_refine_ls_R_factor_gt           0.0598
_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^)+(0.0528P)^2^+2.5844P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1827
_refine_ls_wR_factor_ref         0.1850
_reflns_number_gt                1987
_reflns_number_total             2190
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg200853u_si_001.cif
_cod_data_source_block           Form-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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P2(1)/n  '
_cod_database_code               4501189