Synthesis of (Multi)Silylalkynyl-Substituted Silsesquioxanes Obtained via Silylative Coupling Reaction

Authors:

• Monika Rzonsowska,
• Kinga Zmudzińska,
• Julia Duszczak,
• Katarzyna Mituła,
• Beata Dudziec,
• Patrycja Karolina Żak

Abstract

In the view of the fact that catalytic routes to design functionalized silsesquioxanes are currently of high importance, herein we report the effective functionalization procedure to obtain mono-, di-, and tetrasilylalkynyl-substituted silsesquioxanes of cubic T8 and DDSQ type. The synthetic methodology is based on Ru-hydride complex that turned out to be an efficient catalyst for silylative coupling of ethynylsiloxysubstituted silsesquioxanes with vinylsilanes resulted in their silylalkynyl analogues. The ethynylsiloxysubstituted double-decker silsesquioxanes have been noted to be reactive in this process for the first time. A series of novel compounds were obtained, isolated, and characterized. Due to the presence of silylalkynyl moieties, they constitute an interesting family of Si–O–Si-based unique structures with potential applications