Phase Selection and Energetics in Chiral Alkaline Earth Tartrates and Their Racemic and Meso Analogues: Synthetic, Structural, Computational, and Calorimetric Studies
Leah N. Appelhans; Monica Kosa; A. V. Radha; Petra Simoncic; Alexandra Navrotsky; Michele Parrinello; Anthony K. Cheetham; Journal of the American Chemical Society 131 (2009) 15375–15386; doi:10.1021/ja905690t

data_4105176
_publ_contact_author_address
;
Department of Materials Science and Metallurgy
University of Cambridge
Cambridge CB2 3QZ, UK
;
_publ_contact_author_email       akc30@cam.ac.uk
_publ_contact_author_name        'Anthony K. Cheetham'
_publ_contact_author_phone       '+44 01223-767061'
_publ_section_title
;
 Phase Selection and Energetics in Chiral Alkaline Earth Tartrates and
 Their Racemic and Meso Analogues: Synthetic, Structural, Computational,
 and Calorimetric Studies
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15375
_journal_page_last               15386
_journal_paper_doi               10.1021/ja905690t
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C4 H4 Ca O6'
_chemical_formula_weight         188.15
_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                 121.066(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.593(6)
_cell_length_b                   7.906(3)
_cell_length_c                   9.462(3)
_cell_measurement_temperature    298(2)
_cell_volume                     1127.3(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.960
_diffrn_measured_fraction_theta_max 0.960
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0272
_diffrn_reflns_av_sigmaI/netI    0.0234
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            4611
_diffrn_reflns_theta_full        26.66
_diffrn_reflns_theta_max         26.66
_diffrn_reflns_theta_min         2.70
_exptl_absorpt_coefficient_mu    1.088
_exptl_absorpt_correction_T_max  0.947
_exptl_absorpt_correction_T_min  0.864
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Sheldrick 2001'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.217
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.354
_refine_diff_density_min         -0.310
_refine_diff_density_rms         0.081
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     112
_refine_ls_number_reflns         1144
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0410
_refine_ls_R_factor_gt           0.0344
_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^)+(0.0394P)^2^+4.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0822
_refine_ls_wR_factor_ref         0.0872
_reflns_number_gt                995
_reflns_number_total             1144
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja905690t_si_002_03.cif
_cod_data_source_block           150mcam
_cod_database_code               4105176