Stable Phosphonium Sila-ylide with Reactivity as a Sila-Wittig Reagent
David Gau; Tsuyoshi Kato; Nathalie Saffon-Merceron; Fernando P. Cossío; Antoine Baceiredo; Journal of the American Chemical Society 131 (2009) 8762–8763; doi:10.1021/ja903540b

data_4104629
_publ_section_title
;
 Stable Phosphonium Sila-ylide with Reactivity as a Sila-Wittig Reagent
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8762
_journal_page_last               8763
_journal_paper_doi               10.1021/ja903540b
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C33 H48 N3 P Si'
_chemical_formula_weight         545.80
_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                 103.9630(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.3384(2)
_cell_length_b                   18.7078(3)
_cell_length_c                   19.0897(3)
_cell_measurement_reflns_used    9280
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      26.30
_cell_measurement_theta_min      2.20
_cell_volume                     3236.45(10)
_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      193(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_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  0.0536
_diffrn_reflns_av_sigmaI/netI    0.0453
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            49609
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         5.15
_exptl_absorpt_coefficient_mu    0.147
_exptl_absorpt_correction_T_max  0.9855
_exptl_absorpt_correction_T_min  0.9171
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker-AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.120
_exptl_crystal_description       needle
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.234
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     686
_refine_ls_number_reflns         7972
_refine_ls_number_restraints     1368
_refine_ls_restrained_S_all      0.997
_refine_ls_R_factor_all          0.0806
_refine_ls_R_factor_gt           0.0462
_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^)+(0.0465P)^2^+0.9107P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1033
_refine_ls_wR_factor_ref         0.1170
_reflns_number_gt                5436
_reflns_number_total             7972
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja903540b_si_001.cif
_cod_data_source_block           2a
_cod_original_cell_volume        3236.44(10)
_cod_database_code               4104629