Borylated Methylenephosphonium Salts: Precursors of Elusive Boryl(phosphino)carbenes

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• 作者：Florie Lavigne ; Eddy Maerten ; Gilles Alcaraz ; Nathalie Saffon-Merceron ; Carles Acosta-Silva ; Vicen Branchadell ; Antoine Baceiredo
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：July 7, 2010
• 年：2010
• 卷：132
• 期：26
• 页码：8864-8865
• 全文大小：135K
• 年卷期：v.132,no.26(July 7, 2010)
• ISSN：1520-5126

文摘

The synthesis of a new family of boryl-substituted methylenephosphonium derivatives, the phosphorus analogues of iminium salts, has been developed. They were used in the preparation of the first stable boryl(phosphino)carbene, which has been fully characterized by NMR spectroscopy and X-ray crystallography. Density functional theory calculations indicate that these carbenes can be classified as push−pull carbenes with a relatively small singlet−triplet energy gap.