Synthesis, Structure, and Reactivity of 1,2-(1',1',2',2'-Tetramethyldisilane-1',2')carborane
Francis M. de Rege; Jeremy D. Kassebaum; Brian L. Scott; Kent D. Abney; Gary J. Balaich; Inorganic Chemistry 38 (1999) 486–489; doi:10.1021/ic980992y

data_4321775
_publ_section_title
;
 Synthesis, Structure, and Reactivity of
 1,2-(1',1',2',2'-Tetramethyldisilane-1',2')carborane
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              486
_journal_page_last               489
_journal_paper_doi               10.1021/ic980992y
_journal_volume                  38
_journal_year                    1999
_chemical_formula_sum            'C6 H22 B10 Si2'
_chemical_formula_weight         258.52
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           10
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2y'
_symmetry_space_group_name_H-M   'P 1 2/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 115.49(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            1
_cell_length_a                   6.920(5)
_cell_length_b                   8.797(5)
_cell_length_c                   7.053(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    200
_cell_volume                     387.6(4)
_computing_cell_refinement       'XSCANS 2.10b (Siemens)'
_computing_data_collection       'XSCANS 2.10b (Siemens)'
_computing_data_reduction        'XSCANS 2.10b (Siemens)'
_computing_molecular_graphics    'SHELXTL PC 4.2/360 (Siemens)'
_computing_publication_material  'SHELXTL PC 4.2/360 (Siemens)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200
_diffrn_measurement_device       'Siemens P4/PC'
_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  0.0616
_diffrn_reflns_av_sigmaI/netI    0.1167
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            810
_diffrn_reflns_theta_max         22.51
_diffrn_reflns_theta_min         3.20
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.198
_exptl_absorpt_correction_type   'none applied'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.108
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular plate'
_exptl_crystal_F_000             136
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.200
_refine_diff_density_min         -0.238
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.088
_refine_ls_goodness_of_fit_obs   1.248
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         554
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_restrained_S_obs      1.248
_refine_ls_R_factor_all          0.1261
_refine_ls_R_factor_obs          0.0640
_refine_ls_shift/esd_max         0.003
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0581P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1443
_refine_ls_wR_factor_obs         0.1189
_reflns_number_observed          337
_reflns_number_total             554
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            ic980992y_1.cif
_cod_data_source_block           xr170
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0581P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0581P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 2/m'
_cod_database_code               4321775