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_7212726
_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 I cocrystal of ethenzamide with ethylmalonic acid
;
_chemical_name_systematic
;
Form I cocrystal of ethenzamide with ethylmalonic acid
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                93.04(3)
_cell_angle_beta                 108.70(3)
_cell_angle_gamma                91.72(3)
_cell_formula_units_Z            2
_cell_length_a                   7.6928(15)
_cell_length_b                   8.8062(18)
_cell_length_c                   11.575(2)
_cell_measurement_reflns_used    1913
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      30.9873
_cell_measurement_theta_min      2.3189
_cell_volume                     740.8(3)
_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 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.0152
_diffrn_reflns_av_sigmaI/netI    0.0162
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            10488
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.32
_exptl_absorpt_coefficient_mu    0.105
_exptl_absorpt_correction_T_max  0.9774
_exptl_absorpt_correction_T_min  0.9554
_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    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             316
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.300
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.117
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         3635
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.117
_refine_ls_R_factor_all          0.0478
_refine_ls_R_factor_gt           0.0458
_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^)+(0.0602P)^2^+0.1987P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1180
_refine_ls_wR_factor_ref         0.1199
_reflns_number_gt                3484
_reflns_number_total             3635
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c004491a.txt
_cod_data_source_block           EA+EMA-Form-I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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      P-1
_cod_database_code               7212726