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_7214862
_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 H5 N O4'
_chemical_formula_sum            'C22 H18 N4 O8 S'
_chemical_formula_weight         498.46
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                99.6457(38)
_cell_angle_beta                 106.6493(41)
_cell_angle_gamma                107.6305(42)
_cell_formula_units_Z            2
_cell_length_a                   8.0433(7)
_cell_length_b                   11.0546(8)
_cell_length_c                   13.8361(11)
_cell_measurement_reflns_used    25857
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      59.18
_cell_measurement_theta_min      1
_cell_volume                     1078.85(16)
_computing_cell_refinement       'Bruker APEX2 (2009)'
_computing_data_collection       'Bruker APEX2 (2009)'
_computing_data_reduction        'Bruker APEX2 (2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.959
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'Bruker Apex II CCD'
_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  0.0895
_diffrn_reflns_av_sigmaI/netI    0.0689
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            25857
_diffrn_reflns_theta_full        29.51
_diffrn_reflns_theta_max         29.51
_diffrn_reflns_theta_min         1.60
_exptl_absorpt_coefficient_mu    0.210
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.9219
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Blessing, 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.534
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             516
_refine_diff_density_max         0.560
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     388
_refine_ls_number_reflns         5764
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0834
_refine_ls_R_factor_gt           0.0519
_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^)+(0.0634P)^2^+0.1620P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1120
_refine_ls_wR_factor_ref         0.1251
_reflns_number_gt                4101
_reflns_number_total             5764
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce26069g.txt
_cod_data_source_block           shelxl_PXZ_2NB
_cod_original_cell_volume        1078.84(15)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7214862