Pharmaceutical cocrystals of ethenzamide: structural, solubility and dissolution studies
Aitipamula, Srinivasulu; Wong, Annie B. H.; Chow, Pui Shan; Tan, Reginald B. H.; CrystEngComm 14 (2012) 8515–; doi:10.1039/c2ce26325d

data_7214703
_publ_section_title
;
 Pharmaceutical cocrystals of ethenzamide: structural, solubility and
 dissolution studies
;
_journal_issue                   24
_journal_name_full               CrystEngComm
_journal_page_first              8515
_journal_paper_doi               10.1039/c2ce26325d
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         '2(C9 H11 N O2), C7 H7 N O2'
_chemical_formula_sum            'C25 H29 N3 O6'
_chemical_formula_weight         467.51
_chemical_name_common
'2:1 ethenzamide and 4-aminobenzoic acid cocrystal'
_chemical_name_systematic
;
2:1 ethenzamide and 4-aminobenzoic acid cocrystal
;
_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                 93.39(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0570(18)
_cell_length_b                   32.685(7)
_cell_length_c                   8.1857(16)
_cell_measurement_reflns_used    4765
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      31.0723
_cell_measurement_theta_min      2.4926
_cell_volume                     2419.0(9)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'CCD area deterctor'
_diffrn_measurement_method       '\w scans'
_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  0.0431
_diffrn_reflns_av_sigmaI/netI    0.0549
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       46
_diffrn_reflns_limit_k_min       -46
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            20924
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         30.50
_diffrn_reflns_theta_min         1.25
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.970
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'R. H. Blessing, Acta Cryst. 1995 A51, 33-38'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.284
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.258
_refine_diff_density_min         -0.265
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.192
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     337
_refine_ls_number_reflns         6984
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.192
_refine_ls_R_factor_all          0.1159
_refine_ls_R_factor_gt           0.0864
_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^)+(0.0652P)^2^+0.8594P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1790
_refine_ls_wR_factor_ref         0.1969
_reflns_number_gt                5267
_reflns_number_total             6984
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce26325d.txt
_cod_data_source_block           EA+ABA
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7214703