Zur Synthese des 1,2-Diphenyldecamethylcyclohexasilans
摘要:
The title compound has been prepared by cyclization of 1,6-dibromo-3,4-diphenyldecamethylhexasilane with lithium. The cleavage of the silicon-phenyl bonds. of the cyclohexasilane by CF3SO3H gives the 1,2-bis-triflate derivate.
Polysilanes are known to exhibit the interesting property of σ-bond electrondelocalization. By employing optical spectroscopy (UV-vis), it is possible to judge the degree of delocalization and also differentiate parts of the molecules which are conjugated or not. The current study compares oligosilanes of similar chain length but different substitution pattern. The size of the substituents determines