Formation of Chelated Counteranions Using Lewis Acidic Diboranes: Relevance to Isobutene Polymerization

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• 作者：Jianfang Chai ; Stewart P. Lewis ; Scott Collins ; Timo J. J. Sciarone ; Lee D. Henderson ; Preston A. Chase ; Geoffrey J. Irvine ; Warren E. Piers ; Mark R. J. Elsegood ; William Clegg
• 刊名：Organometallics
• 出版年：2007
• 出版时间：November 5, 2007
• 年：2007
• 卷：26
• 期：23
• 页码：5667 - 5679
• 全文大小：730K
• 年卷期：v.26,no.23(November 5, 2007)
• ISSN：1520-6041

文摘

The reactions of chelating diboranes with PhCMe₂Cl and related initiators were studied by variable-temperature NMR spectroscopy. Although thermally stable ion-pairs featuring weakly coodinating anions(WCA) are formed, isobutene polymerization is complicated by the tendency of these WCA to act ashindered bases toward Brnsted acidic chain ends.