Synthesis, structure, and reactions of novel cyclic and conjugated disilenes are discussed. Photochemical and thermal interconversion among Si& isomers including a cyclotetrasilene, a silylcyclotrisilene, and a bicyclo[ 1. I .O]tetrasilane occurred without apparent participation of the corresponding tetrasila- 1,3-diene. The first spiropentasiladiene derivative, which is thermally very stable in contrast to spiropentadiene, which decomposes below -1 00 "C, shows modified but significant spiroconjugation between the two ring n systems. The first stable silicon compound with a formally sp-hybridized silicon atom, trisilaallene, has a remarkably bent and fluxional kamework and exhibits a significant conjugation between the two trans-bent Si=Si bonds.
|Title of host publication||Organosilicon Chemistry VI|
|Subtitle of host publication||From Molecules to Materials|
|Publisher||Wiley-VCH Verlag GmbH|
|Number of pages||8|
|ISBN (Print)||3527312145, 9783527312146|
|Publication status||Published - 2005 Jul 26|
- Cyclic Disilenes