A Zwitterionic Carbanion Frustrated by Boranes - Dihydrogen Cleavage with Weak Lewis Acids via an "Inverse" Frustrated Lewis Pair Approach
Hui Li; Adelia J. A. Aquino; David B. Cordes; Fernando Hung-Low; William L. Hase; Clemens Krempner; Journal of the American Chemical Society 135 (2013) 16066–16069; doi:10.1021/ja409330h

data_4121075
_publ_contact_author_address
;Department of Chemistry and Biochemistry
Texas Tech University
Lubbock, TX 79409
USA
;
_publ_contact_author_email       Clemens.Krempner@ttu.edu
_publ_contact_author_name        'Clemens Krempner'
_publ_section_title
;
 A Zwitterionic Carbanion Frustrated by Boranes - Dihydrogen Cleavage with
 Weak Lewis Acids via an "Inverse" Frustrated Lewis Pair Approach
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              16066
_journal_page_last               16069
_journal_paper_doi               10.1021/ja409330h
_journal_volume                  135
_journal_year                    2013
_chemical_formula_moiety         'C16 H39 Na O6 Si3'
_chemical_formula_sum            'C16 H39 Na O6 Si3'
_chemical_formula_weight         434.73
_space_group_IT_number           146
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'R 3'
_symmetry_space_group_name_H-M   'R 3 :H'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   15.310(4)
_cell_length_b                   15.310(4)
_cell_length_c                   9.155(2)
_cell_measurement_reflns_used    3784
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.37
_cell_measurement_theta_min      2.66
_cell_volume                     1858.4(8)
_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 0.997
_diffrn_measurement_device_type  'Bruker SMART APEX-II CCD'
_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  0.0524
_diffrn_reflns_av_sigmaI/netI    0.0485
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            7007
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.21
_diffrn_reflns_theta_min         2.66
_exptl_absorpt_coefficient_mu    0.234
_exptl_absorpt_correction_T_max  0.9792
_exptl_absorpt_correction_T_min  0.9680
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.165
_exptl_crystal_description       chunk
_exptl_crystal_F_000             708
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.422
_refine_diff_density_min         -0.366
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     82
_refine_ls_number_reflns         1819
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0707
_refine_ls_R_factor_gt           0.0643
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1174P)^2^+0.9056P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1755
_refine_ls_wR_factor_ref         0.1805
_reflns_number_gt                1624
_reflns_number_total             1819
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja409330h_si_003_2.cif
_cod_data_source_block           2
_cod_original_sg_symbol_H-M      'R 3'
_cod_database_code               4121075