Octasilacubane is an intriguing polyhedral polysilane because of its unique electronic properties arising from highly strained Si-Si σ-bonded framework. The first octasilacubane, octakis (
t-butyldimethylsilyl) octasilacubane was reported by our group in 1988, as the first example of Platonic solid compounds comprising Group 14 elements other than carbon. We then prepared the alkyl-substituted one (ThexSi)
8 (Thex = 1, 1, 2-trimethylpropyl) in 1992. These octasilacubanes are fairly stable, and various reactions, e.g., halogenation, oxidation, and photoreaction have been reported. Thus, the reaction of (ThexSi)
8 with PCl
5 leading to dichlorides via skeletal, rearrangement, the halogenation with Br
2 or I
2 leading to dibromides or diiodides, and the reductive dehalogenation of these dihalides with sodium to regenerate (ThexSi)
8. Photo-initiated partial oxidation with DMSO gave monooxaoctasilahomocubane and dioxaoctasilabishomocubane. In this paper, in addition to these reactions, structure, thermal property, photoluminescent property, and UV property of octasilacubanes were summarized.
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