Lithium 2,2′‐Biphenyldiyltrimethylsilicate; First Observation of Pentaorganosilicates

Abstract

Postulated previously only as intermediates, lithium pentaorganosilicates of type 2-L4 (L = THF, hexamethylphosphoric triamide), which are in equilibrium with silafluorene 1 and the corresponding organolithium, have now been detected at low temperatures by NMR spectroscopy.