Irradiation of octaisopropylcyclotetrasilane (1) in a hydrocarbon solvent successively afforded hexaisopropylcyclotrisilane [Pri2Si]3(2)(λmax320 nm) and tetraisopropyldisilene [Pri2Si![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
SiPri2](3)(λmax 400 nm) with extrusion of di-isopropylsilanediyl (4).
H. Watanabe, Y. Kougo and Y. Nagai, J. Chem. Soc., Chem. Commun., 1984, 66 DOI: 10.1039/C39840000066
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