Polyfluoroalkyl derivatives of silicon. Part XIV. Reaction of trichlorosilane with 1,3,3,3-tetrafluoropropene and 2-chloro-1,3,3,3-tetra- fluoropropene

Photochemical reaction of trichlorosilane with 1,3,3,3-tetrafluoropropene gives trichloro(2-fluoro-1-trifluoromethyl)silane and trichloro(1,3,3,3-tetrafluoropropyl)silane (ratio 37 : 13), together with telomeric material. Similarly 2-chloro-1,3,3,3-tetrafluoropropene affords a mixture of trichloro(2-chloro-1,3,3,3-tetrafluoropropyl)-silane and the reduced compound trichloro(1,3,3,3-tetrafluoropropyl)silane (ratio 7 : 3) in high yield. Treatment of trichloro(2-chloro-1,3,3,3-tetrafluoropropyl)silane with quinoline yields mainly cis-and trans-trichloro(1,3,3,3-tetrafluoropropenyl)silane and a lesser amount of cis- and trans-trichloro(2-chloro-3,3,3-trifluoropropenyl)silane. This olefin mixture when fluorinated with antimony trifluoride gives a mixture of the trifluorosilyl analogues which is stable to 350 °C in vacuo.