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[ACIE] Prof. Haiping Xia published a paper entitled "Isolation of an 11-Atom Polydentate Carbon Chain Chelate via Cycloaddition of Cyclic Metal Carbyne with Alkynes"

2018-02-08

Title: Isolation of an 11-Atom Polydentate Carbon Chain Chelate via Cycloaddition of Cyclic Metal Carbyne with Alkynes

Authors: Congqing Zhu,Jun Zhu,Xiaoxi Zhou,Qin Zhu,Yuhui Yang,Ting-Bin Wen,Haiping Xia

Abstract:

Carbon ligands have long played an important role in organometallic chemistry. However, previous examples of all-carbon chelating ligands are limited. Herein, we present a novel complex with an 11-atom carbon chain as a polydentate chelating ligand. This species was formed by the [2+2+2] cycloaddition reaction of alkynes with osmapentalyne, which contains the smallest carbyne bond angle (only 127.9) observed. Density functional theory calculations revealed that the electron-donating groups play a key role in the stabilization of this polydentate carbon chain chelate. This reaction is also the first [2+2+2] cycloaddition reaction of an alkyne with a late transition metal carbyne complex. This study not only enriches the chemistry of polydentate carbon chain chelate, but also further deepens our perception of the chelating ability of the carbon ligand.

Full-Link: http://onlinelibrary.wiley.com/doi/10.1002/anie.201713391/full