Chemical and Structural Diversity in Chiral Magnesium Tartrates and their Racemic andMesoAnalogues
Kam, Kinson C.; Young, Karen L. M.; Cheetham, Anthony K.; Crystal Growth & Design 7 (2007) 1522–; doi:10.1021/cg070388a

data_4504376
_publ_section_title
;
 Chemical and Structural Diversity in Chiral Magnesium Tartrates and their
 Racemic andMesoAnalogues
;
_journal_issue                   8
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1522
_journal_paper_doi               10.1021/cg070388a
_journal_volume                  7
_journal_year                    2007
_chemical_formula_sum            'C4 H4 Mg O6'
_chemical_formula_weight         172.38
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 108.156(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.866(4)
_cell_length_b                   9.204(5)
_cell_length_c                   9.459(5)
_cell_measurement_temperature    293(2)
_cell_volume                     568.0(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'CCD area Detector'
_diffrn_measurement_method       'Omega Scan'
_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  0.0748
_diffrn_reflns_av_sigmaI/netI    0.0818
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2203
_diffrn_reflns_theta_full        26.33
_diffrn_reflns_theta_max         26.33
_diffrn_reflns_theta_min         3.83
_exptl_absorpt_coefficient_mu    0.288
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.016
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.417
_refine_diff_density_min         -0.391
_refine_diff_density_rms         0.105
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.162
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     59
_refine_ls_number_reflns         575
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.161
_refine_ls_R_factor_all          0.0984
_refine_ls_R_factor_gt           0.0581
_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^)+(0.0600P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1345
_refine_ls_wR_factor_ref         0.1447
_reflns_number_gt                361
_reflns_number_total             575
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg070388asi20070423_072236.cif
_cod_data_source_block           9-MgM200
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4504376