Preparation, properties, and reduction of heteroaromatic quinoids with 1,4-diazacyclopentadien-2-ylidene terminals

Org Lett. 2005 Jan 6;7(1):115-8. doi: 10.1021/ol0476927.

Abstract

New n-type heteroaromatic quinoids with 1,4-diazacyclopentadien-2-ylidene terminals were prepared. These quinoids possess strong electron-accepting properties, comparable to dicyanomethylene analogues. Both the radical anions and dianions were generated by metal reduction using 3% Na-Hg in THF and were spectroscopically characterized.