Synthesis of Tricyclo[3.1.0.02,4]hexasilane and Its Photochemical Isomerization to Tricyclo[2.2.0.02,5]hexasilane

This is the authors' abstract. We don't add key points for this paper.

The first anti-tricyclo[3.1.0.02,4]hexasilane 1 was synthesized as pale yellow crystals. Irradiation (λ > 370 nm) of 1 gave its skeletal isomer, tricyclo[2.2.0.02,5]hexasilane 2, in 80% yield. The photochemical [σ2s + σ2s] cycloreversion of 1 followed by the thermal [π2s + π2a] cycloaddition to 2 would explain the overall isomerization.