Conformational and enantiotropic polymorphism of a 1 : 1 cocrystal involving ethenzamide and ethylmalonic acid
Aitipamula, Srinivasulu; Chow, Pui Shan; Tan, Reginald B. H.; CrystEngComm 12 (2010) 3691–; doi:10.1039/c004491a

data_7212727
_publ_section_title
;
 Conformational and enantiotropic polymorphism of a 1&#x2009;:&#x2009;1
 cocrystal involving ethenzamide and ethylmalonic acid
;
_journal_issue                   11
_journal_name_full               CrystEngComm
_journal_page_first              3691
_journal_paper_doi               10.1039/c004491a
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C9 H11 N O2, C5 H8 O4'
_chemical_formula_sum            'C14 H19 N O6'
_chemical_formula_weight         297.30
_chemical_name_common
;
Form II of ethenzamide and ethylmalonic acid cocrystal
;
_chemical_name_systematic
;
Form II of ethenzamide and ethylmalonic 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                 108.45(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.501(3)
_cell_length_b                   7.6438(15)
_cell_length_c                   14.323(3)
_cell_measurement_reflns_used    3946
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      30.8624
_cell_measurement_theta_min      2.6647
_cell_volume                     1506.0(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      110(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0451
_diffrn_reflns_av_sigmaI/netI    0.0441
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            11739
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.982
_exptl_absorpt_correction_T_min  0.975
_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    1.311
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.423
_refine_diff_density_min         -0.289
_refine_diff_density_rms         0.085
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.286
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         3718
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.286
_refine_ls_R_factor_all          0.1071
_refine_ls_R_factor_gt           0.0962
_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^)+(0.0885P)^2^+0.8049P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2261
_refine_ls_wR_factor_ref         0.2345
_reflns_number_gt                3308
_reflns_number_total             3718
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c004491a.txt
_cod_data_source_block           EA+EMA-Form-II
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7212727