“Silver Effect” in Gold(I) Catalysis: An Overlooked Important Factor
Journal of the American Chemical Society2012Vol. 134(21), pp. 9012–9019
Citations Over TimeTop 1% of 2012 papers
Dawei Wang, Rong Cai, Sripadh Sharma, James G. Jirak, Sravan K. Thummanapelli, Novruz G. Akhmedov, Hui Zhang, Xingbo Liu, Jeffrey L. Petersen, Xiaodong Shi
Abstract
Clear experimental evidence from X-ray photoelectron spectroscopy and (31)P 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 "rare"), the conventional [L-Au](+) catalysts could not promote the reaction without the presence of silver. This investigation has therefore revealed a long-overlooked "silver effect" in gold catalysis and should lead to revision of the actual mechanism.
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