Nonclassical β-Hydrogen Elimination of Hydrosilazido Zirconium Compounds via Direct Hydrogen Transfer
KaKing Yan; Arkady Ellern; Aaron D. Sadow; Journal of the American Chemical Society 134 (2012) 9154–9156; doi:10.1021/ja302226c

data_4118011
_publ_contact_author_address
;1605 Gilman Hall
Department of Chemistry
Iowa State University
Ames IA 50011    
USA
;
_publ_contact_author_email       sadow@iastate.edu
_publ_contact_author_fax         +1-515-294-0105
_publ_contact_author_name        'Aaron D. Sadow'
_publ_contact_author_phone       +1-515-294-8069
_publ_section_title
;
 Nonclassical \b-Hydrogen Elimination of Hydrosilazido Zirconium Compounds
 via Direct Hydrogen Transfer
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9154
_journal_page_last               9156
_journal_paper_doi               10.1021/ja302226c
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C20 H38 N2 Si3 Zr'
_chemical_formula_weight         482.01
_chemical_name_common            CpZr[C5H4SiMe2NSiHMe2][N(SiHMe2)Bu]
_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           'APEX2 v2010.11-3'
_cell_angle_alpha                90
_cell_angle_beta                 100.3540(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.8361(15)
_cell_length_b                   8.5923(8)
_cell_length_c                   17.1866(16)
_cell_measurement_reflns_used    5596
_cell_measurement_temperature    173.(2)
_cell_measurement_theta_max      27.0419
_cell_measurement_theta_min      2.4595
_cell_volume                     2445.7(4)
_computing_cell_refinement       'SAINT V7.66A (Bruker AXS, 2009)'
_computing_data_collection       'APEX2 Suite (Bruker AXS, 2009)'
_computing_data_reduction        'SAINT V7.66A (Bruker AXS, 2009)'
_computing_molecular_graphics    'XSHELL (Bruker AXS, 2007)'
_computing_publication_material  'APEX2 Suite (Bruker AXS, 2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173.(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  ' BRUKER APEX2 CCD Diffractometer'
_diffrn_measurement_method       '\w scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0396
_diffrn_reflns_av_sigmaI/netI    0.0378
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            24423
_diffrn_reflns_theta_full        28.63
_diffrn_reflns_theta_max         28.63
_diffrn_reflns_theta_min         1.23
_exptl_absorpt_coefficient_mu    0.604
_exptl_absorpt_correction_T_max  0.93
_exptl_absorpt_correction_T_min  0.82
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.309
_exptl_crystal_description       prism
_exptl_crystal_F_000             1016
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.405
_refine_diff_density_min         -0.384
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     252
_refine_ls_number_reflns         6276
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0486
_refine_ls_R_factor_gt           0.0323
_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^)+(0.0306P)^2^+1.4027P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0711
_refine_ls_wR_factor_ref         0.0832
_reflns_number_gt                4930
_reflns_number_total             6276
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja302226c_si_003.cif
_cod_data_source_block           I
_cod_database_code               4118011