Tautomerisation and polymorphism in molecular complexes of piroxicam with mono-substituted benzoic acids
Wales, Craig; Thomas, Lynne H.; Wilson, Chick C.; CrystEngComm 14 (2012) 7264–; doi:10.1039/c2ce26069g

data_7214861
_publ_section_title
;
 Tautomerisation and polymorphism in molecular complexes of piroxicam with
 mono-substituted benzoic acids
;
_journal_issue                   21
_journal_name_full               CrystEngComm
_journal_page_first              7264
_journal_paper_doi               10.1039/c2ce26069g
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C15 H13 N3 O4 S, C7 H6 O3'
_chemical_formula_sum            'C22 H19 N3 O7 S'
_chemical_formula_weight         469.46
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.438(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.5454(5)
_cell_length_b                   9.2118(4)
_cell_length_c                   19.8419(9)
_cell_measurement_reflns_used    68360
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.88
_cell_measurement_theta_min      1
_cell_volume                     2060.74(16)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD; rotation images'
_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  0.1531
_diffrn_reflns_av_sigmaI/netI    0.1283
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            20087
_diffrn_reflns_theta_full        27.82
_diffrn_reflns_theta_max         27.82
_diffrn_reflns_theta_min         1.88
_exptl_absorpt_coefficient_mu    0.210
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.7726
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Blessing, 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.513
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             976
_refine_diff_density_max         0.286
_refine_diff_density_min         -0.399
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.956
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     374
_refine_ls_number_reflns         4853
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.956
_refine_ls_R_factor_all          0.1301
_refine_ls_R_factor_gt           0.0506
_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^)+(0.0342P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0839
_refine_ls_wR_factor_ref         0.1044
_reflns_number_gt                2639
_reflns_number_total             4853
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce26069g.txt
_cod_data_source_block           shelxl_PXZ_2HB
_cod_original_cell_volume        2060.73(16)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7214861