摘要
Herein,we disclose an unexpected Si–O–Si cage reorganization that was observed during the standard hydrolytic condensation procedure of tetrasilanol double-decker silsesquioxane(DDSQ)with respective mono-and di-chlorosilanes.The investigation of this process allowed us to propose the possible mechanism of this transformation.The formation of all structures was confirmed by NMR,FT-IR,and X-ray(for eleven examples)techniques and their thermal stability was verified(TGA).Additionally,we revealed unusual intramolecular homocoupling product formation during the silylative coupling reaction of vinyl-DDSQ derivatives.It deserves to be emphasized that these findings are the first example of a thorough investigation of hydrolytic condensation and the silylative coupling procedures in the chemistry of DDSQs.
基金
funded by the National Science Centre(NCN)grant no UMO-2016/23/B/ST5/00201,UMO-2017/27/N/ST5/00175,and UMO-2020/36/T/ST5/00072 and grants no.POWR.03.02.00-00-I023/17 and POWR.03.02.00-00-I026/16 cofinanced by the European Union through the European Social Fund under the Operational Program Knowledge Education Development.
