PUB - Publikationen an der Universität Bielefeld

Based on a semiflexible trisilacyclohexane framework a series of directed, tridentate Lewis acids were synthesized by hydrosilylation using various (chloro)methylsilanes. The axial alignment of the three electron deficient functions in one spatial direction allows creating poly-Lewis acids with chalice-like cavities. The directed, tridentate poly-Lewis acids were obtained in quantitative yields and characterized by multinuclear NMR spectroscopy, CHN analysis and X-ray diffraction experiments. The Lewis acidity of the introduced silicon functions was quantified and classified using the Gutmann-Beckett method.