Asymmetry of the "Strongest" OHO Hydrogen Bond, in the Monoanion of (\±)-α,α'-Di-tert-butylsuccinate
Charles L. Perrin; Jonathan S. Lau; Yeong-Joon Kim; Phaneendrasai Karri; Curtis Moore; Arnold L. Rheingold; Journal of the American Chemical Society 131 (2009) 13548–13554; doi:10.1021/ja905806h

data_4105051
_publ_section_title
;
 Asymmetry of the "Strongest" OHO Hydrogen Bond, in the Monoanion of
 (\+-)-\a,\a'-Di-tert-butylsuccinate
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13548
_journal_page_last               13554
_journal_paper_doi               10.1021/ja905806h
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C24 H54 Ca O14'
_chemical_formula_weight         606.75
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 92.390(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.4772(6)
_cell_length_b                   14.4843(13)
_cell_length_c                   17.5838(15)
_cell_measurement_reflns_used    9947
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.37
_cell_measurement_theta_min      2.71
_cell_volume                     1648.2(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX CCD'
_diffrn_measurement_method       '\f and \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  0.0271
_diffrn_reflns_av_sigmaI/netI    0.0255
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13255
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.38
_diffrn_reflns_theta_min         1.82
_exptl_absorpt_coefficient_mu    0.249
_exptl_absorpt_correction_T_max  0.9755
_exptl_absorpt_correction_T_min  0.9403
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_description       Block
_exptl_crystal_F_000             660
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0.0016(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     213
_refine_ls_number_reflns         3021
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0496
_refine_ls_R_factor_gt           0.0429
_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^)+(0.0221P)^2^+2.6120P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0949
_refine_ls_wR_factor_ref         0.0979
_reflns_number_gt                2716
_reflns_number_total             3021
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja905806h_si_002_5.cif
_cod_data_source_block           "'Calcium_a,a'-di-tert-butylsuccinate'"
_cod_database_code               4105051