Ammonia in the Ion-Source. III. Clustering With N-Oxides, Sulfoxides and Sulfones

Abstract

Under positive ion chemical ionization conditions, with ammonia as reagent gas at relatively low pressure, N-oxides, sulfoxides and sulfones form clusters with a proton and one or more ammonia molecules; these clusters can be represented as [M+H]⁺, [M+NH₄]⁺, [M+N₂H₇]⁺, [2M+H]⁺ and [2M+NH₄]⁺. The unimolecular decomposition of the clusters can be followed by the accompanying metastable peaks.