研究室工作進展 Feb. 28th, 2019

發表于 2019-02-28

Selective Reduction of 1,5-Diazacyclooctatetraenes:

Synthesis and Structures of Aromatic Diazacyclooctatetraenyl Dianions

and 2,6-Bipyrrolinyl Dianionic Co(II) Complex

Zhe Huang, Gengwen Tan（南京大學）, Chao Chen（南京大學）, Wen-Xiong Zhang,

Xinping Wang（南京大學）and Zhenfeng Xi*

Chem. Commun. 2019, 55, 2648-2651.

1,5-Diazacyclooctatetraene (NCOT) is an interesting diaza-analogue of the well-known cyclooctatetraene (COT) with its two 1,5-CHs being replaced by two N atoms, but the reactivity of NCOT remains almost entirely unknown. The incorporation of nitrogen atoms into the conjugated system would bring about new chemistry.

In this work, as shown in the scheme, the first structurally well-defined aromatic 1,5-diazacyclooctatetraenyl dianion, an analogue of the well-known cyclooctatetraenyl dianion, was realized via a two-electron reduction of NCOT with potassium. A novel dinuclear Co(II) complex bridged by a bipyrrolinyl dianion was formed by the reduction of NCOT with a Co(I) complex and was successfully structurally characterized.

This work is a joint project with 南京大學化學學院王新平教授課題組 supported by NSFC 重大項目“面向精準合成的新金屬配合物及其反應研究”.