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_7214702
_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         'C9 H11 N O2, C8 H8 O4'
_chemical_formula_sum            'C17 H19 N O6'
_chemical_formula_weight         333.33
_chemical_name_common
;
1:1 ethenzamide and vanillic acid cocrystal
;
_chemical_name_systematic
;
cocrystal of ethenzamide with vanillic 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                 102.87(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.774(3)
_cell_length_b                   14.911(3)
_cell_length_c                   8.0828(16)
_cell_measurement_reflns_used    3643
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      31.0181
_cell_measurement_theta_min      1.5165
_cell_volume                     1618.4(6)
_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      193(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku Saturn 70 CCD area detector'
_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  0.0336
_diffrn_reflns_av_sigmaI/netI    0.0322
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            12434
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.52
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_T_max  0.976
_exptl_absorpt_correction_T_min  0.9741
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'R. H. Blessing, Acta Cryst. 1995 A51, 33-38'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.368
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.268
_refine_diff_density_min         -0.224
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.199
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4009
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.199
_refine_ls_R_factor_all          0.0832
_refine_ls_R_factor_gt           0.0737
_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^)+(0.0753P)^2^+0.4439P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1786
_refine_ls_wR_factor_ref         0.1861
_reflns_number_gt                3520
_reflns_number_total             4009
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce26325d.txt
_cod_data_source_block           EA+VA
_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               7214702