An Organometalllic NiIV Complex That Participates in Competing Transmetalation and C(sp2)–O Bond-Forming Reductive Elimination Reactions

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• 作者：Elizabeth A. Meucci ; Nicole M. Camasso ; Melanie S. Sanford
• 刊名：Organometallics
• 出版年：2017
• 出版时间：January 23, 2017
• 年：2017
• 卷：36
• 期：2
• 页码：247-250
• 全文大小：333K
• ISSN：1520-6041

文摘

This communication describes the synthesis of an organometallic Ni^IV complex bearing a labile trifluoroacetate (OTFA) ligand via the oxidation of a Ni^II precursor with PhI(OTFA)₂. Intramolecular C(sp²)–O bond-forming reductive elimination from this Ni^IV complex is relatively slow, requiring 6 h at 70 °C to reach completion. In contrast, transmetalation with TMSCF₃ occurs within just 1 h at room temperature to generate a Ni^IV–CF₃ complex. These studies show that intermolecular reactions such as transmetalation can be competitive with intramolecular reductive elimination processes at Ni^IV centers.