Abstract Decafluorocyclohepta-l, 3-diene underwent reductive addition-elimination with sodium borohydride to give mainly 1H-nonafluorocyclohepta-1, 3-diene, together with minor products, the 1H, 4H-octafluoro-analogue and, most significantly, 5H-nonafluorocyclohepta- l, 3-diene. Decafluorocyclohepta-l, 4-diene similarly gave mainly a mixture of 1H-and 2H- nonafluorocyclohepta-l, 4-diene, together with some 6H-nonafluorocyclohepta-l, 4-diene ...
