Phenazopyridine Cocrystal and Salts That Exhibit Enhanced Solubility and Stability
Tao, Qian; Chen, Jia-Mei; Ma, Lei; Lu, Tong-Bu; Crystal Growth & Design 12 (2012) 3144–; doi:10.1021/cg300327x

data_4506236
_publ_section_title
;
 Phenazopyridine Cocrystal and Salts That Exhibit Enhanced Solubility and
 Stability
;
_journal_issue                   6
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              3144
_journal_paper_doi               10.1021/cg300327x
_journal_volume                  12
_journal_year                    2012
_chemical_formula_moiety         'C11 H12 N5, C8 H7 O3'
_chemical_formula_sum            'C19 H19 N5 O3'
_chemical_formula_weight         365.39
_chemical_melting_point          448.4
_chemical_name_common            'phenazopyridine 4-hydroxyphenylacetic acid'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 97.728(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.2789(2)
_cell_length_b                   10.3034(2)
_cell_length_c                   26.0066(4)
_cell_measurement_reflns_used    3567
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      71.2863
_cell_measurement_theta_min      3.4272
_cell_volume                     3525.85(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.2417
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Xcalibur, Onyx, Nova'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0302
_diffrn_reflns_av_sigmaI/netI    0.0365
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            7102
_diffrn_reflns_theta_full        71.42
_diffrn_reflns_theta_max         71.42
_diffrn_reflns_theta_min         3.43
_exptl_absorpt_coefficient_mu    0.794
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.62500
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.377
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1536
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.213
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         3319
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0573
_refine_ls_R_factor_gt           0.0433
_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^)+(0.0650P)^2^+0.4389P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1074
_refine_ls_wR_factor_ref         0.1247
_reflns_number_gt                2567
_reflns_number_total             3319
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg300327x_si_004.cif
_cod_data_source_block           tq_3_110506
_cod_database_code               4506236