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_4501191
_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           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   9.0787(11)
_cell_length_b                   14.2261(17)
_cell_length_c                   17.154(2)
_cell_measurement_reflns_used    5544
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.95
_cell_measurement_theta_min      2.37
_cell_volume                     2215.5(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0370
_diffrn_reflns_av_sigmaI/netI    0.0219
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            20081
_diffrn_reflns_theta_full        25.97
_diffrn_reflns_theta_max         25.97
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9714
_exptl_absorpt_correction_T_min  0.9615
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    1.369
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.31
_refine_diff_density_max         0.314
_refine_diff_density_min         -0.327
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.185
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         2160
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.185
_refine_ls_R_factor_all          0.0546
_refine_ls_R_factor_gt           0.0521
_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^)+(0.0494P)^2^+3.0804P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1475
_refine_ls_wR_factor_ref         0.1488
_reflns_number_gt                2005
_reflns_number_total             2160
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg200853u_si_003.cif
_cod_data_source_block           Form-III-100K
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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_cell_volume        2215.6(5)
_cod_original_sg_symbol_H-M      'Pbca '
_cod_database_code               4501191