Unusual Reactions of Cyclic Fluorosiloxanes. Issue 7 (6th March 2017)

• Record Type: Journal Article
• Authors: Oguri, Naoki; Egawa, Yasunobu; Kawakami, Yoshiteru; Kobuna, Chika; Takeda, Nobuhiro; Unno, Masafumi
• Is Part Of: ChemistrySelect. Volume 2:Issue 7(2017)
• Page Start: 2300
• Page End: 2304
• Publication Date: 2017-03-06
• Subjects: cyclotetrasiloxane -- fluorination -- fluorosiloxane -- siloxane bond cleavage -- siloxane precursors; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201700306
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The 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. Abstract : The 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. On the other hand, different bond cleavage was observed for [ i ‐BuSiOF]4 resulting in a formation of linear fluorotrisiloxane in 50 % yield.