New, stable isomers of [C 2 H 4 O] + ˙, and [C 2 H 4 O 2 ] + ˙, the radical cations [CH 3 COH] + ˙ and [CH 3 OCOH] + ˙

The ions [CH3COH]+˙ and [CH3OCOH]+˙ have been characterised by their collisional activation mass spectra and their heats of formation were measured as 865 ± 20 and 661 ± 5 kJ mol–1respectively; [CH3COH]+˙ is the reacting Configuration for H˙ loss from [CH2CHOH]+˙.