Pasteur's tartaramide/malamide quasiracemates: new entries and departures from near inversion symmetry
Pinter, Emily N.; Cantrell, Lee S.; Day, Graeme M.; Wheeler, Kraig A.; CrystEngComm 20 (2018) 4213–; doi:10.1039/C8CE00791H

data_7230996
_publ_section_title
;
 Pasteur's tartaramide/malamide quasiracemates: new entries and departures
 from near inversion symmetry
;
_journal_issue                   30
_journal_name_full               CrystEngComm
_journal_page_first              4213
_journal_paper_doi               10.1039/C8CE00791H
_journal_volume                  20
_journal_year                    2018
_chemical_formula_moiety         'C4 H8 N2 O4'
_chemical_formula_sum            'C4 H8 N2 O4'
_chemical_formula_weight         148.12
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-03-24 deposited with the CCDC.
2018-06-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 95.619(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.0175(4)
_cell_length_b                   8.1062(4)
_cell_length_c                   9.2562(4)
_cell_measurement_reflns_used    6566
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      68.23
_cell_measurement_theta_min      4.80
_cell_volume                     598.68(5)
_computing_cell_refinement       APEX2
_computing_data_collection       'APEX2 (Bruker, 2013)'
_computing_data_reduction
;
SADABS (Bruker, 2013) and XPREP (Bruker, 2013)
;
_computing_molecular_graphics    'XSEED (Barbour, 2001)'
_computing_publication_material  'XSEED (Barbour, 2001)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'Bruker APEXII CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0292
_diffrn_reflns_av_unetI/netI     0.0150
_diffrn_reflns_Laue_measured_fraction_full 0.984
_diffrn_reflns_Laue_measured_fraction_max 0.984
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            8705
_diffrn_reflns_point_group_measured_fraction_full 0.984
_diffrn_reflns_point_group_measured_fraction_max 0.984
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.228
_diffrn_reflns_theta_min         5.544
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    1.287
_exptl_absorpt_correction_T_max  0.753
_exptl_absorpt_correction_T_min  0.657
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS-2014/7, Bruker AXS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.643
_exptl_crystal_description       block
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.395
_exptl_crystal_size_mid          0.341
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.314
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.180
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1082
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.180
_refine_ls_R_factor_all          0.0333
_refine_ls_R_factor_gt           0.0330
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0466P)^2^+0.2565P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0857
_refine_ls_wR_factor_ref         0.0860
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1067
_reflns_number_total             1082
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8ce00791h2.cif
_cod_data_source_block           16kaw57
_cod_depositor_comments
'Adding full bibliography for 7230989--7230996.cif.'
_cod_database_code               7230996
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.630
_shelx_estimated_absorpt_t_max   0.783
_shelx_res_checksum              73933