1,3-Dinitrone Pincer Complexes of Palladium and Nickel: Synthesis, Structural Characterizations, and Catalysis

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• 作者：Yao Zhang ; Guoyong Song ; Gaoyuan Ma ; Jing Zhao ; Cheng-Ling Pan ; Xingwei Li
• 刊名：Organometallics
• 出版年：2009
• 出版时间：June 8, 2009
• 年：2009
• 卷：28
• 期：11
• 页码：3233-3238
• 全文大小：169K
• 年卷期：v.28,no.11(June 8, 2009)
• ISSN：1520-6041

文摘

Neutral and cationic Pd(II) and Ni(II) OCO-type pincer complexes have been synthesized from the metalation of 1,3-dinitrones via C−H or C−Br bond activation using Pd(0), Pd(II), and Ni(0) starting materials. In each complex, the two six-membered metallacycles are non-coplanar and atropisomerization proceeds with a low barrier. Palladium dinitrone complexes have been shown as active catalysts for Heck couplings and the related Ni complex for Kumada reactions with turnover numbers up to 950000.