鈥淪ilver Effect鈥?in Gold(I) Catalysis: An Overlooked Important Factor

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• 作者：Dawei Wang ; Rong Cai ; Sripadh Sharma ; James Jirak ; Sravan K. Thummanapelli ; Novruz G. Akhmedov ; Hui Zhang ; Xingbo Liu ; Jeffrey L. Petersen ; Xiaodong Shi
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：May 30, 2012
• 年：2012
• 卷：134
• 期：21
• 页码：9012-9019
• 全文大小：536K
• 年卷期：v.134,no.21(May 30, 2012)
• ISSN：1520-5126

文摘

Clear experimental evidence from X-ray photoelectron spectroscopy and ³¹P NMR spectroscopy has been obtained for the first time to confirm that the combination of Ag⁺ cation with [L-Au]⁺ results in the formation of different complexes in solution. Re-evaluation of literature-reported gold-catalyzed reactions revealed a significant difference in the reactivities with and without silver. In extreme cases (more than 鈥渞are鈥?, the conventional [L-Au]⁺ catalysts could not promote the reaction without the presence of silver. This investigation has therefore revealed a long-overlooked 鈥渟ilver effect鈥?in gold catalysis and should lead to revision of the actual mechanism.