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. 2018 Jul 24;54(60):8399-8402.
doi: 10.1039/c8cc03297a.

Phenylene-bridged cross-conjugated 1,2,3-trisilacyclopentadienes

Hui Zhao  1 , Lukas Klemmer, Michael J Cowley, Moumita Majumdar, Volker Huch, Michael Zimmer, David Scheschkewitz
Affiliations

Phenylene-bridged cross-conjugated 1,2,3-trisilacyclopentadienes

Hui Zhao et al. Chem Commun (Camb). .

Abstract

1,2,3-Trisilacyclopentadienes are obtained from the reactions of cyclotrisilene c-Si3R4 (R = iPr3C6H2) with phenyl and diphenyl acetylene, respectively. With 1,4-diethynyl benzene the cross-conjugated bridging of two of the Si3C2 cycles by a para-phenylene linker is achieved. UV/vis spectroscopy indicates a small but significant effect of cross-conjugation, which is confirmed by TD-DFT calculations. The formation mechanism of the 1,2,3-trisilacyclopentadienes is elucidated by VT NMR.

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