| 摘要 |
A silacyclobutene compound having the formula: wherein R1 and R2 are independently chloro, triorganosiloxy, organooxy, triorganosilyl, or a monovalent hydrocarbon group; R3 is a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or triorganosilyl; R5 is hydrogen or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation; and R4 and R6 are independently hydrogen or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or together are an alkanediyl group, wherein the alkanediyl group and the carbon atoms to which it is attached form a carbocyclic ring having 4 to 7 carbon atoms; provided that R3 is not aryl. Methods of preparing the silacyclobutene compounds, silane polymers containing at least one silacyclobutene unit, and siloxane polymers containing at least one silacyclobutene unit.
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