Cooperative Transition Metal/Lewis Acid Bond-Activation Reactions by a Bidentate (Boryl)iminomethane Complex: A Significant Metal鈥揃orane Interaction Promoted by a Small Bite-Angle LZ Chelate

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• 作者：Brandon R. Barnett ; Curtis E. Moore ; Arnold L. Rheingold ; Joshua S. Figueroa
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：July 23, 2014
• 年：2014
• 卷：136
• 期：29
• 页码：10262-10265
• 全文大小：315K
• ISSN：1520-5126

文摘

The synthesis of a three-coordinate Pt鈥揵orane complex featuring a bidentate 鈥淟Z鈥?(boryl)iminomethane (BIM) ligand is reported. Unlike other LZ-type borane ligands featuring a single-donor buttress, the small bite angle enforced by the BIM ligand is shown to promote a significant metal鈥揵orane reverse-dative 蟽-interaction akin to multiply strapped metalloboratranes. The steric accessibility of the reactive Pt 鈫?B bond fostered by the BIM ligand allows for a rich reactivity profile toward small molecules that exploit metal鈥揵orane cooperative effects. The unligated (boryl)iminomethane BIM is also synthetically accessible and functions as a Frustrated Lewis Pair (FLP). The ability of the free BIM to effect bond activation reactions is contrasted with the behavior seen in the corresponding platinum-bound complexes.