Zur Chemie der Cyclohexasilane

摘要

Starting from Si6ph12(I) the cyclohexasilanes Si6ph6Br6(II), Si6ph6H6(III) and Si6Br12(IV) and a cyclopentasilane, Si5ph8me2, were prepared and characterized by analysis, NMR- and mass spectroscopy. A high stability of the five membered ring in comparison to the other ring sizes is found by chemical investigation and by mass fragmentation. I. r. and Raman spectra were measured and assigned, high coupling effects, mainly in the SiSi region, explain some anomaluos frequencies.