Oxirane, also called ethylene oxide, is the organic compound with the formula
C2H4O. It is a cyclic ether consist of two carbon atoms and one oxygen atom, formic a ring.
Whereas oxetane or 1,3 -propylene oxide is an heterocyclic organic compound with the molecular formula
C3H6O, having a four membered ring with three carbon atoms and one oxygen atom.
Vinyl alcohol, with the formula
CH2CHOH, is an isomer of oxirane or ethylene oxide.