Abstract
AbstractThe reactivity of cyclic fluorosiloxanes, all‐cis‐[PhSiOF]4 and [i‐BuSiOF]4, was investigated. Unusual bond cleavage was observed in the reaction of all‐cis‐[PhSiOF]4 with 2,6‐lutidine to afford a hexafluorosilicate salt in 29 % yield. On the other hand, different bond cleavage was observed for [i‐BuSiOF]4 resulting in a formation of a linear fluorotrisiloxane in 50 % yield. All products were characterized by spectroscopic analyses as well as X‐ray crystallography. In this paper, we discuss several new Si–O–Si bond cleavage and formation reactions; all reactions were performed under mild conditions that did not generate harmful acids. Consequently, cyclic fluorosiloxanes could serve as useful precursors for a wide variety of silicon compounds such as linear siloxanes, hexa‐coordinated silicates, and well‐defined silsesquioxanes.
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