Mechanistic Duality in Palladium-Catalyzed Cross-Coupling Reactions of Aryldimethylsilanolates. Intermediacy of an 8-Si-4 Arylpalladium(II) Silanolate
Scott E. Denmark; Russell C. Smith; Journal of the American Chemical Society 132 (2010) 1243–1245; doi:10.1021/ja907049y

data_4101840
_publ_contact_author
; 
Prof. Scott E. Denmark 
School of Chemical Sciences 
245 Roger Adams Laboratory
University of Illinois 
600 South Mathews Avenue 
Urbana, Illinois  61801 
USA 
;
_publ_contact_author_email       denmark@scs.uiuc.edu
_publ_contact_author_fax         '1  217 333 3984'
_publ_contact_author_phone       '1  217 333 0066'
_publ_section_title
;
 Mechanistic Duality in Palladium-Catalyzed Cross-Coupling Reactions of
 Aryldimethylsilanolates. Intermediacy of an 8-Si-4 Arylpalladium(II)
 Silanolate
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1243
_journal_page_last               1245
_journal_paper_doi               10.1021/ja907049y
_journal_volume                  132
_journal_year                    2010
_chemical_formula_moiety         'C52 H50 O2 P2 Pd Si'
_chemical_formula_sum            'C52 H50 O2 P2 Pd Si'
_chemical_formula_weight         903.35
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
; 
2007-02-02   text and data added, srw 
;
_cell_angle_alpha                90.909(2)
_cell_angle_beta                 105.1700(10)
_cell_angle_gamma                103.595(2)
_cell_formula_units_Z            2
_cell_length_a                   12.5239(3)
_cell_length_b                   12.6398(4)
_cell_length_c                   15.2157(4)
_cell_measurement_reflns_used    5455
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      27.13
_cell_measurement_theta_min      2.31
_cell_volume                     2251.87(11)
_computing_cell_refinement       'SAINT V6.22 (Bruker, 2001)'
_computing_data_collection       'APEX2 V1.0-27 (Bruker, 2004)'
_computing_data_reduction        'SAINT V6.22 (Bruker, 2001)'
_computing_molecular_graphics    'SHELXTL V6.12 (Bruker, 2001)'
_computing_publication_material  'XCIF (Bruker, 2001)'
_computing_structure_refinement  'SHELXTL V6.12 (Bruker, 2001)'
_computing_structure_solution    'SHELXTL V6.12 (Bruker, 2001)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'Bruker Kappa/ApexII CCD'
_diffrn_measurement_method       'profile data from \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_radiation_wavelength_id  ga71pas
_diffrn_reflns_av_R_equivalents  0.0425
_diffrn_reflns_av_sigmaI/netI    0.0466
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            36554
_diffrn_reflns_theta_full        27.91
_diffrn_reflns_theta_max         27.91
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.549
_exptl_absorpt_correction_T_max  0.9786
_exptl_absorpt_correction_T_min  0.8679
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SHELXTL/XPREP (Bruker, 2001)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       tabular
_exptl_crystal_F_000             936
_exptl_crystal_id                ga71pas
_exptl_crystal_preparation
; 
The data crystal was mounted using oil (Parantone-N, Exxon) to a 
0.3 mm cryo-loop (Hampton Research) with the (0 -1 -4) scattering 
planes roughly normal to the spindle axis. 
;
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.069
_refine_diff_density_min         -0.340
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.016
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     577
_refine_ls_number_reflns         10754
_refine_ls_number_restraints     258
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0522
_refine_ls_R_factor_gt           0.0353
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0353P)^2^+0.7605P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0778
_refine_ls_wR_factor_ref         0.0847
_reflns_number_gt                8458
_reflns_number_total             10754
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja907049y_si_003.cif
_cod_data_source_block           ga71pas
_cod_original_sg_symbol_Hall     '-P 1 '
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               4101840