Structure and chemistry of 1-silafluorenyl dianion, its derivatives, and an organosilicon diradical dianion

…, TC Stringfellow, D Ballweg, IA Guzei…

Index: Liu; Stringfellow; Ballweg; Guzei; West Journal of the American Chemical Society, 2002 , vol. 124, # 1 p. 49 - 57

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Citation Number: 80

Abstract

1-Silafluorene dianion was synthesized by potassium reduction of 1, 1-dichloro-1- silafluorene in refluxing THF. The X-ray structure of 1, 1-dipotassio-1-silafluorene (3b) shows CC bond length equalization in the five-membered silole ring and CC bond length alternation in the six-membered benzene rings, indicating aromatic delocalization of electrons in the silole ring. The downfield 29Si chemical shift at 29.0 ppm and theoretical ...