Synthesis of Bis(alkenyl)oligosilanes via Double Hydrosilylation and Their Structures and Photophysical Properties

A series of novel bis(alkenyl)oligosilanes were synthesized via ruthenium‐catalyzed double hydrosilylation of alkynes with dihydrooligosilanes. The structural and photophysical features of the bis(alkenyl)oligosilanes were studied by X‐ray crystallography and UV and fluorescence spectra. The functional groups on the alkenyl moieties significantly affect not only their conformation and arrangement in crystals but also the UV and fluorescence spectra.