期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 127, 期 11, 页码 3989-3996出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja0441099
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We present a comprehensive survey of different C-H activation pathways over various kinds of active sites of terminal oxygens [=O] and bridge oxygens [-O-] by using Mo3O9 model systems. This allows us to provide some insights into fundamental issues concerning C-H activation by metal oxo species involved in many heterogeneous, homogeneous, and enzymatic processes. We show that H abstraction is the most feasible reaction pathway for the activation of a C-H bond on molybdenum oxides; and that [=O] is more active than [-O-]. Our calculations also suggest that (2+2) can be an alternative if M=O bond possesses a high polarity, while (5+2) can provide another effective pathway if two M O bonds are in close proximity. Implications for the related heterogeneous, homogeneous, and enzymatic processes are discussed.
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