1,4-bis(triethyl-silyl)butadiyne at 250°C for 24 h afforded 1,1-dimesityl-3-silyl-2-silylethynyl-1-silacyclopropenes (3 and 5) and dimesitylbis(silylethynyl)silanes (4 and 6), respectively. The thermolysis of silacyclopropene 3 under the same conditions cleanly produced an isomerization produit 4.
Silicon-carbon unsaturated compounds. 20. Formation and reactions of disilacyclopropanes and molecular structure of 3-(hydroxydimesitylsilyl)-1,1-dimesityl-2,2-bis(trimethylsilyl)-1-silacyclopropane