Metal-Free, Stereospecific Bis-Silylation of Functionalized Alkynes with NHC-Supported Silylaminosilylene
Cui, Haiyan; Ma, Bing; Cui, Chunming; Organometallics 31 (2012) 7339–; doi:10.1021/om3009958

data_4079724
_publ_section_title
;
 Metal-Free, Stereospecific Bis-Silylation of Functionalized Alkynes with
 NHC-Supported Silylaminosilylene
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              7339
_journal_paper_doi               10.1021/om3009958
_journal_volume                  31
_journal_year                    2012
_chemical_formula_sum            'C30 H50 Cl N3 O2 Si2'
_chemical_formula_weight         576.36
_chemical_name_common            8
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.981(4)
_cell_length_b                   15.637(4)
_cell_length_c                   12.337(3)
_cell_measurement_reflns_used    4249
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      72.2
_cell_measurement_theta_min      27.6
_cell_volume                     3275.9(14)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalClear
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'CrystalStructure 3.8'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      113(2)
_diffrn_detector_area_resol_mean 14.63
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0394
_diffrn_reflns_av_sigmaI/netI    0.0313
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            31911
_diffrn_reflns_theta_full        72.39
_diffrn_reflns_theta_max         72.39
_diffrn_reflns_theta_min         3.84
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.958
_exptl_absorpt_correction_T_max  0.7195
_exptl_absorpt_correction_T_min  0.6726
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.169
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.537
_refine_diff_density_min         -0.528
_refine_diff_density_rms         0.139
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.015(11)
_refine_ls_extinction_coef       0.0185(5)
_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   1.225
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     358
_refine_ls_number_reflns         6319
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.225
_refine_ls_R_factor_all          0.0459
_refine_ls_R_factor_gt           0.0454
_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^)+(0.0643P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0970
_refine_ls_wR_factor_ref         0.0973
_reflns_number_gt                6133
_reflns_number_total             6319
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om3009958_si_002.cif
_cod_data_source_block           a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        3275.8(13)
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               4079724