Synthesis, Structure, and Fluxional Behavior of Donor-Stabilized Bis(silylene)tungsten Complexes
Ueno, Keiji; Masuko, Akira; Ogino, Hiroshi; Organometallics 16 (1997) 5023–; doi:10.1021/om970609h

data_4078387
_publ_section_title
;
 Synthesis, Structure, and Fluxional Behavior of Donor-Stabilized
 Bis(silylene)tungsten Complexes
;
_journal_issue                   23
_journal_name_full               Organometallics
_journal_page_first              5023
_journal_paper_doi               10.1021/om970609h
_journal_volume                  16
_journal_year                    1997
_chemical_formula_sum            'C15 H27 N O2 Si2 W'
_chemical_formula_weight         493.41
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     heavy
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 94.430(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.5690(14)
_cell_length_b                   8.7952(9)
_cell_length_c                   12.953(2)
_cell_measurement_reflns_used    80
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      30
_cell_measurement_theta_min      25
_cell_volume                     1882.0(4)
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Rigaku AFC-6A'
_diffrn_measurement_method       omega/2theta
_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  0.0218
_diffrn_reflns_av_sigmaI/netI    0.0798
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            6225
_diffrn_reflns_theta_max         32.50
_diffrn_reflns_theta_min         1.58
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    6.269
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.741
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.15
_refine_diff_density_max         2.479
_refine_diff_density_min         -4.258
_refine_diff_density_rms         0.252
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.998
_refine_ls_goodness_of_fit_obs   1.082
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         5888
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.998
_refine_ls_restrained_S_obs      1.082
_refine_ls_R_factor_all          0.0765
_refine_ls_R_factor_obs          0.0526
_refine_ls_shift/esd_max         0.001
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0713P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1246
_refine_ls_wR_factor_obs         0.1176
_reflns_number_observed          4502
_reflns_number_total             5888
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            om970609h.cif
_cod_data_source_block           CpW(CO)2{(SiMe2)2...NEt2}
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0713P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0713P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               4078387