Structural Aspects of Trimethylsilylated Branched Group 14 Compounds
Baumgartner, Judith; Fischer, Roland; Fischer, Jelena; Wallner, Andreas; Marschner, Christoph; Flörke, Ulrich; Organometallics 24 (2005) 6450–; doi:10.1021/om050835o

data_4076216
_publ_section_title
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 Structural Aspects of Trimethylsilylated Branched Group 14 Compounds
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_journal_issue                   26
_journal_name_full               Organometallics
_journal_page_first              6450
_journal_paper_doi               10.1021/om050835o
_journal_volume                  24
_journal_year                    2005
_chemical_formula_sum            'C18 H54 Si6 Sn2'
_chemical_formula_weight         676.53
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           155
_symmetry_cell_setting           rhombohedral
_symmetry_space_group_name_Hall  'R 3 2"'
_symmetry_space_group_name_H-M   'R 3 2 :H'
_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                120.00
_cell_formula_units_Z            3
_cell_length_a                   16.290(2)
_cell_length_b                   16.290(2)
_cell_length_c                   11.578(2)
_cell_measurement_temperature    253(2)
_cell_volume                     2660.8(7)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_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      253(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0332
_diffrn_reflns_av_sigmaI/netI    0.0149
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9370
_diffrn_reflns_theta_full        26.33
_diffrn_reflns_theta_max         26.33
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    1.615
_exptl_absorpt_correction_T_max  0.7384
_exptl_absorpt_correction_T_min  0.5790
_exptl_absorpt_correction_type   SADABS
_exptl_absorpt_process_details   XPREP
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             1038
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.916
_refine_diff_density_min         -0.624
_refine_diff_density_rms         0.094
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.53(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.166
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     44
_refine_ls_number_reflns         1218
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.166
_refine_ls_R_factor_all          0.0356
_refine_ls_R_factor_gt           0.0345
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0287P)^2^+19.4234P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0934
_refine_ls_wR_factor_ref         0.0939
_reflns_number_gt                1173
_reflns_number_total             1218
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om050835osi20050928_095303.cif
_cod_data_source_block           270j
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Rhombohedral' changed to
'rhombohedral' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
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_cod_original_sg_symbol_H-M      R32
_cod_database_code               4076216