Normal and Inverse Primary Kinetic Deuterium Isotope Effects for C-H Bond Reductive Elimination and Oxidative Addition Reactions of Molybdenocene and Tungstenocene Complexes: Evidence for Benzene σ-Complex Intermediates
David G. Churchill; Kevin E. Janak; Joshua S. Wittenberg; Gerard Parkin; Journal of the American Chemical Society 125 (2003) 1403–1420; doi:10.1021/ja027670k

data_4113428
_publ_section_title
;
 Normal and Inverse Primary Kinetic Deuterium Isotope Effects for C-H Bond
 Reductive Elimination and Oxidative Addition Reactions of Molybdenocene
 and Tungstenocene Complexes: Evidence for Benzene \s-Complex
 Intermediates
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1403
_journal_page_last               1420
_journal_paper_doi               10.1021/ja027670k
_journal_volume                  125
_journal_year                    2003
_chemical_formula_sum            'C20 H32 Si W'
_chemical_formula_weight         484.40
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                102.8510(10)
_cell_angle_beta                 106.1650(10)
_cell_angle_gamma                95.8540(10)
_cell_formula_units_Z            4
_cell_length_a                   10.2075(5)
_cell_length_b                   13.2638(6)
_cell_length_c                   15.3878(7)
_cell_measurement_temperature    218(2)
_cell_volume                     1920.75(16)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      218(2)
_diffrn_measured_fraction_theta_full 0.893
_diffrn_measured_fraction_theta_max 0.893
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0267
_diffrn_reflns_av_sigmaI/netI    0.0512
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13979
_diffrn_reflns_theta_full        28.31
_diffrn_reflns_theta_max         28.31
_diffrn_reflns_theta_min         1.43
_exptl_absorpt_coefficient_mu    6.073
_exptl_absorpt_correction_T_max  0.3764
_exptl_absorpt_correction_T_min  0.1950
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.675
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.130
_refine_diff_density_min         -1.040
_refine_diff_density_rms         0.140
_refine_ls_extinction_coef       0.00046(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.016
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     434
_refine_ls_number_reflns         8544
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.016
_refine_ls_R_factor_all          0.0561
_refine_ls_R_factor_gt           0.0337
_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^)+(0.0338P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0693
_refine_ls_wR_factor_ref         0.0762
_reflns_number_gt                6439
_reflns_number_total             8544
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja027670k-5_s1_4.cif
_cod_data_source_block           whs10
_cod_database_code               4113428