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_7214863
_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 F O2'
_chemical_formula_sum            'C22 H18 F N3 O6 S'
_chemical_formula_weight         471.45
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.053(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.415(11)
_cell_length_b                   21.17(2)
_cell_length_c                   9.557(10)
_cell_measurement_reflns_used    3872
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.7
_cell_measurement_theta_min      1.9
_cell_volume                     2075(4)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r5 (Rigaku, 2010)'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r5 (Rigaku, 2010)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r5 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku Saturn CCD'
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_monochromator  'silicon 111'
_diffrn_radiation_source         synchrotron
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.68890
_diffrn_reflns_av_R_equivalents  0.0934
_diffrn_reflns_av_sigmaI/netI    0.0841
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            18646
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.67
_diffrn_reflns_theta_min         1.86
_exptl_absorpt_coefficient_mu    0.212
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7083
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'ABSCOR, Rigaku 1995'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.509
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             976
_refine_diff_density_max         1.224
_refine_diff_density_min         -0.811
_refine_diff_density_rms         0.104
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     308
_refine_ls_number_reflns         4796
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.1437
_refine_ls_R_factor_gt           0.0952
_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^)+(0.1696P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2475
_refine_ls_wR_factor_ref         0.2938
_reflns_number_gt                2932
_reflns_number_total             4796
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce26069g.txt
_cod_data_source_block           shelxl_PXZ_3FBA
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7214863