[Angew. Chem. Int. Ed.] Prof. Haiping XIA published a paper entitled 'Isolation of an Eleven-Atom Polydentate Carbon-Chain Chelate Obtained by Cycloaddition of a Cyclic Osmium Carbyne with an Alkyne'-College of Chemistry and Chemical Engineering

[Angew. Chem. Int. Ed.] Prof. Haiping XIA published a paper entitled 'Isolation of an Eleven-Atom Polydentate Carbon-Chain Chelate Obtained by Cycloaddition of a Cyclic Osmium Carbyne with an Alkyne'

Publish Date:17.April 2018 Visted: Times

Title: Isolation of an Eleven-Atom Polydentate Carbon-Chain Chelate Obtained by Cycloaddition of a Cyclic Osmium Carbyne with an Alkyne

Author: Congqing Zhu, Jun Zhu, Xiaoxi Zhou, Qin Zhu, Yuhui Yang, Ting Bin Wen, and Haiping Xia*

Summary:

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 eleven-atom carbon chain as a polydentate chelating ligand. This species was formed by the [2+2+2] cycloaddition reaction of two equivalents of an alkyne with an osmapentalyne that contains the smallest carbyne bond angle (127.98) ever observed. Density functional calculations revealed that electron-donating groups play a key role in the stabilization of this polydentate carbon-chain chelate. This process 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 chelates, but also deepens our understanding of the chelating ability of carbon ligands.

Full Link:https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201713391

Research Highlights

[Angew. Chem. Int. Ed.] Prof. Haiping XIA published a paper entitled 'Isolation of an Eleven-Atom Polydentate Carbon-Chain Chelate Obtained by Cycloaddition of a Cyclic Osmium Carbyne with an Alkyne'