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_4113427
_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            'C26 H36 Si W'
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_chemical_name_systematic
; 
 ? 
;
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_cell_angle_beta                 96.926(14)
_cell_angle_gamma                90.00
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_cell_length_a                   8.599(4)
_cell_length_b                   11.415(6)
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_computing_cell_refinement       'Bruker SMART'
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_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
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_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      228(2)
_diffrn_measured_fraction_theta_full 0.860
_diffrn_measured_fraction_theta_max 0.860
_diffrn_measurement_device_type  'CCD area detector'
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_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  0.0403
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_diffrn_reflns_limit_h_max       11
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_diffrn_reflns_limit_k_min       -15
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_diffrn_reflns_limit_l_min       -15
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_exptl_crystal_F_000             560
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_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
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_refine_ls_shift/su_mean         0.016
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0233P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_reflns_number_gt                2123
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_reflns_threshold_expression     >2sigma(I)
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