Cyclic and Bicyclic Methylpolysilanes and Some Oligosilanylene-Bridged Derivatives
Wallner, Andreas; Hlina, Johann; Konopa, Tina; Wagner, Harald; Baumgartner, Judith; Marschner, Christoph; Flörke, Ulrich; Organometallics 29 (2010) 2660–; doi:10.1021/om901104h

data_4067736
_publ_section_title
;
 Cyclic and Bicyclic Methylpolysilanes and Some Oligosilanylene-Bridged
 Derivatives
;
_journal_issue                   12
_journal_name_full               Organometallics
_journal_page_first              2660
_journal_paper_doi               10.1021/om901104h
_journal_volume                  29
_journal_year                    2010
_chemical_formula_sum            'C42 H126 Si22'
_chemical_formula_weight         1249.41
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 93.36(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.4839(19)
_cell_length_b                   24.749(5)
_cell_length_c                   16.970(3)
_cell_measurement_reflns_used    646
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      34.961
_cell_measurement_theta_min      4.601
_cell_volume                     3976.3(13)
_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      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'SMART APEX'
_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  0.2401
_diffrn_reflns_av_sigmaI/netI    0.2730
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            28357
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    0.371
_exptl_absorpt_correction_T_max  0.9228
_exptl_absorpt_correction_T_min  0.8419
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.044
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             1372
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.447
_refine_diff_density_min         -0.407
_refine_diff_density_rms         0.086
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.848
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         6993
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.848
_refine_ls_R_factor_all          0.1998
_refine_ls_R_factor_gt           0.0687
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0434P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1113
_refine_ls_wR_factor_ref         0.1427
_reflns_number_gt                2752
_reflns_number_total             6993
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om901104h_si_002.cif
_cod_data_source_block           14_322j
_cod_original_cell_volume        3976.2(14)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               4067736