Development of unique dianionic Ir(Ⅲ) CCC pincer complexes with a favourable spirocyclic NHC framework

• 来源期刊: 中国科学：化学（英文版）
• 年，卷（期）: 2020,（12）
• 所属期刊栏目: COMMUNICATIONS
• 页码范围: 1761-1766
• 页数: 6页
• 语种: 英文

摘要

A new type of dianionic Ir(Ⅲ) CCC pincer complexes (SNHC-Ir,la-lc) is successfully designed and synthesized by developing a one-step methodology,which involves an initial coordination of Ir(Ⅰ) with the NHC and subsequent metallation of double sp2C-H bonds.This method is considerably useful over those reported by using strong coordination ligand or carbonic anion exchange,and would provide an alternative efficient template of organometallics synthesis.Experimental and density functional theory(DFT) calculation results indicate that the spirocyclic framework is a favourable factor for the facile formation and stabilization of these complexes.Primary investigation shows that chloride lb can well catalyze homo and hetero addition of styrene derivatives and remote olefin isomerization,which represents the first catalytic application of the dianionic CCC pincer complexes.