Synthesis and thermal behavior of cis- and trans-1-tert-butyl-4,5-dimethyl-2-phenyl-2-(trimethylsiloxy)-1-(trimethylsilyl)-1-silacyclohex-4-ene

The thermolysis of cis-2-siloxy-1-silyl-1-silacyclohex-4-ene 2 at 250 °C for 24 h gave silyl-substituted cyclopentene 4, while trans-2-siloxy-1-silyl-1-silacyclohex-4-ene 3 afforded 4 and trans-1-siloxy-2-silyl-1-silacyclohex-4-ene 5.