Fluorination of tetralin with potassium tetrafluorocobaltate(III)

Abstract Fluorination of tetralin over KCoF 4 at 270–300° gave in addition to hexadecafluoro-bicyclo[4,4,0]deca- 1(6)-ene, tetradecafluorobicyclo[4,4,0]deca-1(6) 3(4)-diene and 3H- pentadecafluorobicyclo[4,4,0]deca-1(6)-ene already described (1) several new compounds. These were identified as 9-H-tridecafluorobicyclo[4,4,0] deca-1(6),3(4)-diene, perfluorotetralin, 3,8- and 3,9-dihydrotetradecafluorobicyclo[4,4,0] deca-1(6)-ene and 3H-undecafluorobicyclo[4,4,0] deca-1(6), 2(3), 4(5)-triene. The use of 13 C n.m.r, in structural determination and the mechanism of the fluorination will be discussed.