Gas phase chemistry of nitrogen containing negative ions: deprotonated nitromethane, acetone oxime, and acetone oxime o-methyl ether

Abstract

The ion [CH 2NO 2] − is a weak base, a poor nucleophile and a weak oxidising agent. It is unable to oxidise COS but does react with CS 2 by the reaction [CH 2NO 2] − + CS 2 → CS 2O −· + [CH 2NO] ·. Deprotonated acetone oxime [Me 2CNO] − is a moderate gas phase oxidising agent reacting with COS, CS 2 and SO 2 to yield CO 2S −·, CS 2O −· and SO −· 3 respectively. Δ H ∘ acid of (CH 3) 2CNOMe is bracketted at 1560±15 kJ mol −1; the deprotonated species forms addition complexes with CO 2, CS 2, COS and SO 2.