Synthesis and Properties of Bridgehead-Functionalized Permethylbicyclo[2.2.2]octasilanes.
Stueger, Harald; Hasken, Bernd; Gross, Uwe; Fischer, Roland; Torvisco Gomez, Ana; Organometallics 32 (2013) 4490–4500; doi:10.1021/om400184y

data_4081225
_publ_section_title
;
 Synthesis and Properties of Bridgehead-Functionalized
 Permethylbicyclo[2.2.2]octasilanes.
;
_journal_issue                   16
_journal_name_full               Organometallics
_journal_page_first              4490
_journal_page_last               4500
_journal_paper_doi               10.1021/om400184y
_journal_volume                  32
_journal_year                    2013
_chemical_formula_sum            'C17 H48 O Si9'
_chemical_formula_weight         521.36
_chemical_name_systematic
; 
1-Acyl-4-(trimethylsilyl)dodecamethylbicyclo[2.2.2]octasilane
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 106.455(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.3627(17)
_cell_length_b                   10.7968(11)
_cell_length_c                   17.9881(19)
_cell_measurement_reflns_used    6982
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.83
_cell_measurement_theta_min      2.23
_cell_volume                     3234.0(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\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_reflns_av_R_equivalents  0.0734
_diffrn_reflns_av_sigmaI/netI    0.0730
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            30691
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.23
_exptl_absorpt_coefficient_mu    0.377
_exptl_absorpt_correction_T_max  0.934
_exptl_absorpt_correction_T_min  0.890
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.071
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1136
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.965
_refine_diff_density_min         -0.422
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     260
_refine_ls_number_reflns         6338
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0921
_refine_ls_R_factor_gt           0.0484
_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^)+(0.0533P)^2^+1.9108P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1015
_refine_ls_wR_factor_ref         0.1184
_reflns_number_gt                4282
_reflns_number_total             6338
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om400184y_si_001.cif
_cod_data_source_block           rf273_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_sg_symbol_H-M      P2(1)/c
_cod_database_code               4081225