Structure and Chemistry of 1-Silafluorenyl Dianion, Its Derivatives, and an Organosilicon Diradical Dianion
Yuxia Liu; Thomas C. Stringfellow; David Ballweg; Ilia A. Guzei; Robert West; Journal of the American Chemical Society 124 (2002) 49–57; doi:10.1021/ja011821m

data_4114565
_publ_contact_author
; 
   Prof. Robert West 
   Department of Chemistry 
   University of Wisconsin 
   1101 University Ave. 
   Madison, WI  53706-1396  USA 
;
_publ_contact_author_email       west@chem.wisc.edu
_publ_contact_author_fax         1(608)2620381
_publ_contact_author_phone       1(608)2621873
_publ_section_title
;
 Structure and Chemistry of 1-Silafluorenyl Dianion, Its Derivatives, and
 an Organosilicon Diradical Dianion
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              49
_journal_page_last               57
_journal_paper_doi               10.1021/ja011821m
_journal_volume                  124
_journal_year                    2002
_chemical_formula_sum            'C36 H57.33 K2 O10 Si'
_chemical_formula_weight         756.44
_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
_cell_angle_alpha                95.020(2)
_cell_angle_beta                 98.726(2)
_cell_angle_gamma                96.053(2)
_cell_formula_units_Z            3
_cell_length_a                   10.5459(9)
_cell_length_b                   15.9281(12)
_cell_length_c                   17.8197(15)
_cell_measurement_temperature    173(2)
_cell_volume                     2925.8(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.927
_diffrn_measured_fraction_theta_max 0.927
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.1062
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            11090
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.65
_exptl_absorpt_coefficient_mu    0.327
_exptl_absorpt_correction_T_max  0.9376
_exptl_absorpt_correction_T_min  0.9027
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.288
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.422
_refine_diff_density_min         -0.388
_refine_diff_density_rms         0.079
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     604
_refine_ls_number_reflns         11090
_refine_ls_number_restraints     42
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.1203
_refine_ls_R_factor_gt           0.0630
_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^)+(0.0920P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1690
_refine_ls_wR_factor_ref         0.1963
_reflns_number_gt                5670
_reflns_number_total             11090
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja011821m_4.cif
_cod_data_source_block           west14p
_cod_database_code               4114565