Transition-Metal-Promoted or -Catalyzed Exocyclic Alkyne Insertion via Zirconacyclopentene with Carborane Auxiliary: Formation of Symmetric or Unsymmetric Benzocarboranes
Shikuo Ren; Zaozao Qiu; Zuowei Xie; Journal of the American Chemical Society 134 (2012) 3242–3254; doi:10.1021/ja211485t

data_4117475
_publ_section_title
;
 Transition-Metal-Promoted or -Catalyzed Exocyclic Alkyne Insertion via
 Zirconacyclopentene with Carborane Auxiliary: Formation of Symmetric or
 Unsymmetric Benzocarboranes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              3242
_journal_page_last               3254
_journal_paper_doi               10.1021/ja211485t
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C19 H34 B10 Si'
_chemical_formula_weight         398.65
_chemical_name_systematic
; 
 ? 
;
_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                 113.184(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.579(2)
_cell_length_b                   13.033(2)
_cell_length_c                   14.930(2)
_cell_measurement_temperature    293(2)
_cell_volume                     2428.9(6)
_computing_cell_refinement       'BRUKER SMART CCD DIFFRACTOMETER'
_computing_data_collection       'BRUKER SMART CCD DIFFRACTOMETER'
_computing_data_reduction        'BRUKER SMART CCD DIFFRACTOMETER'
_computing_molecular_graphics    'SIEMENS SHELXTL'
_computing_publication_material  'SIEMENS SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'BRUKER SMART CCD DIFFRACTOMETER'
_diffrn_measurement_method       'OMEGA SCAN'
_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  0.0496
_diffrn_reflns_av_sigmaI/netI    0.0560
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            12905
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.63
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5922
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.090
_exptl_crystal_description       Block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.230
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4285
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0985
_refine_ls_R_factor_gt           0.0544
_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^)+(0.0920P)^2^+0.1503P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1403
_refine_ls_wR_factor_ref         0.1745
_reflns_number_gt                2666
_reflns_number_total             4285
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja211485t_si_001_6.cif
_cod_data_source_block           3q
_cod_original_cell_volume        2428.8(7)
_cod_database_code               4117475