gave an additional 1.3 g of unreacted 2. The yield of crude 5 is thus 73.5% of the reacted 2, bp 60°( 0.5 mm). It showed the expected azide and nitro absorption in the ir and was analyzed as the adduct to propiolic acid.l-(2-Fluoro-2,2-dinitroethyl)-4-(or 5-) carboxy-1,2,3-triazole (6).-To 2.15 g of 4 in 10 ml of chloroform was added 0.9 g of propiolic acid, and the mixture was allowed to stand at room temperature for 3 days. The solid was filtered off and washed with a small amount of chloroform, and a second crop was obtained by chilling the filtrate. After recrystallization from acetonitrile-carbon tetrachloride (1:1), there was obtained 2.65 g (88.5%) of 6: mp 160°with gassing (decarboxylation); nmr

Aus dem Cyclohexen (I) entstehen die isomeren Epoxide (II) und (III), deren NMR‐Spektren untersucht werden.