Cocrystals of Piroxicam with Carboxylic Acids
Childs, Scott L.; Hardcastle, Kenneth I.; Crystal Growth & Design 7 (2007) 1291–; doi:10.1021/cg060742p

data_4504057
_publ_section_title
;
 Cocrystals of Piroxicam with Carboxylic Acids
;
_journal_issue                   7
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1291
_journal_paper_doi               10.1021/cg060742p
_journal_volume                  7
_journal_year                    2007
_chemical_formula_moiety         'C15 H13 N3 O4 S, C8 H16 O2'
_chemical_formula_sum            'C30 H26 N6 O8 S2'
_chemical_formula_weight         662.69
_chemical_name_common            'piroxicam:malonic acid'
_chemical_name_systematic
;
 4-Hydroxy-2-methyl-N-(2-pyridyl)-2H-1,2-benzothiazine

 -3-carboxamide-1,1-dioxide malonic acid

;
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 101.720(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   15.692(8)
_cell_length_b                   16.195(7)
_cell_length_c                   6.999(3)
_cell_measurement_reflns_used    651
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      42.97
_cell_measurement_theta_min      8.47
_cell_volume                     1741.6(14)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.957
_diffrn_measured_fraction_theta_max 0.957
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.1371
_diffrn_reflns_av_sigmaI/netI    0.1148
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            5129
_diffrn_reflns_theta_full        45.17
_diffrn_reflns_theta_max         45.17
_diffrn_reflns_theta_min         8.47
_exptl_absorpt_coefficient_mu    1.852
_exptl_absorpt_correction_T_max  0.9817
_exptl_absorpt_correction_T_min  0.8365
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.264
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'flat needle'
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.354
_refine_diff_density_min         -0.401
_refine_diff_density_rms         0.090
_refine_ls_extinction_coef       0.017(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         1364
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.1243
_refine_ls_R_factor_gt           0.0853
_refine_ls_shift/su_max          0.040
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2426
_refine_ls_wR_factor_ref         0.2641
_reflns_number_gt                740
_reflns_number_total             1364
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg060742psi20061021_092419.cif
_cod_data_source_block           4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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        1741.7(14)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4504057