Synthesis and Facile Ring Expansion of Silylenecyclotetrasilane
Iwamoto, Takeaki; Furiya, Yuichi; Kobayashi, Hideki; Isobe, Hiroyuki; Kira, Mitsuo; Organometallics 29 (2010) 1869–; doi:10.1021/om9010577

data_4067640
_publ_section_title
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 Synthesis and Facile Ring Expansion of Silylenecyclotetrasilane
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_journal_issue                   8
_journal_name_full               Organometallics
_journal_page_first              1869
_journal_paper_doi               10.1021/om9010577
_journal_volume                  29
_journal_year                    2010
_chemical_formula_sum            'C26 H72 Si11'
_chemical_formula_weight         693.83
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.850(3)
_cell_length_b                   16.464(4)
_cell_length_c                   22.984(5)
_cell_measurement_reflns_used    8161
_cell_measurement_temperature    120
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      2.63
_cell_volume                     4484.1(19)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      120
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'multilayered conforcal mirror'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0222
_diffrn_reflns_av_sigmaI/netI    0.0153
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            50380
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.52
_exptl_absorpt_coefficient_mu    0.335
_exptl_absorpt_correction_T_max  0.9360
_exptl_absorpt_correction_T_min  0.9360
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick)1996'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.028
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1528
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.571
_refine_diff_density_min         -0.154
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details
'Flack H D (1983), Acta Cryst. A39, 876-881, 4568 Friedel pairs'
_refine_ls_abs_structure_Flack   0.00(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     358
_refine_ls_number_reflns         10265
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0201
_refine_ls_R_factor_gt           0.0192
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0315P)^2^+0.5171P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0517
_refine_ls_wR_factor_ref         0.0524
_reflns_number_gt                10026
_reflns_number_total             10265
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om9010577_si_002.cif
_cod_data_source_block           yf05_cyclopentasilene
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4067640