The equilibrium between γ-lactones and alkenoic acids
Abstract
Hexan- and undecan-4-olide are shown, by mass spectroscopy, to be deuteriated at all positions in hot 50% deuteriosulphuric acid; this shows that these lactones are in equilibrium with all the respective isomeric alkenoic acids. Under the same conditions octadecan-4-olide is deuteriated to at least C-11.