Lewis Acid-Mediated β-Hydride Abstraction Reactions of Divalent M(C(SiHMe2)3)2THF2(M = Ca, Yb)
KaKing Yan; Brianna M. Upton; Arkady Ellern; Aaron D. Sadow; Journal of the American Chemical Society 131 (2009) 15110–15111; doi:10.1021/ja9070865

data_4105211
_publ_contact_author_address
;1605 Gilman Hall
Department of Chemistry
Iowa State University
Ames IA 50011
;
_publ_contact_author_email       sadow@iastate.edu
_publ_contact_author_name        'Aaron D. Sadow'
_publ_contact_author_phone       5152948069
_publ_section_title
;
 Lewis Acid-Mediated \b-Hydride Abstraction Reactions of Divalent
 M(C(SiHMe2)3)2THF2(M = Ca, Yb)
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15110
_journal_page_last               15111
_journal_paper_doi               10.1021/ja9070865
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C22 H58 O2 Si6 Yb'
_chemical_formula_weight         696.26
_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                 121.189(16)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.792(12)
_cell_length_b                   9.284(4)
_cell_length_c                   18.655(10)
_cell_measurement_reflns_used    869
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     3377(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      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.950
_diffrn_measurement_device_type  'Bruker APEX-II 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  0.0566
_diffrn_reflns_av_sigmaI/netI    0.0567
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            14537
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.42
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    2.999
_exptl_absorpt_correction_T_max  0.74
_exptl_absorpt_correction_T_min  0.45
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.370
_exptl_crystal_density_meas      ?
_exptl_crystal_description       plate
_exptl_crystal_F_000             1440
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.548
_refine_diff_density_min         -1.056
_refine_diff_density_rms         0.134
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     159
_refine_ls_number_reflns         4044
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0480
_refine_ls_R_factor_gt           0.0329
_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^)+(0.0279P)^2^+2.0237P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0627
_refine_ls_wR_factor_ref         0.0684
_reflns_number_gt                3424
_reflns_number_total             4044
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9070865_si_005.cif
_cod_data_source_block           Yb(C(SiHMe2)3)2(THF)2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               4105211