| 摘要 |
1342428 Halogenated cyclobutanes W R GRACE & CO 22 Nov 1971 [27 Nov 1970 10 May 1971 9 Aug 1971 (2)] 54188/71 Addition to 1342427 Heading C2C [Also in Division A5] The invention comprises the novel compounds 1 - chloro - 2,4,4 - trifluorocyclobutane and 1 - methyl - 2 - chloro - 3,3 - difluorocyclobutane, and their preparation by reacting 2- chloro - 1,1 - difluoroethylene with vinyl fluoride. The first named compound may also be prepared by reacting 1,1-difluoroethylene with 1-chloro-2-fluoroethylene. |
