Elimination of AgR (R = H, CH

₃, C₆H₅) from collisionally-activated argentinated amines

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Eur. J. Mass Spectrom. 6, 187 - 192 (2000)

Elimination of AgR (R = H, CH₃, C₆H₅) from collisionally-activated argentinated amines

R. Natasha Grewal, Christopher F. Rodriquez, Tamer Shoeib, Ivan K. Chu, Ya-Ping Tu, Alan C. Hopkinson and K.W. Michael Siu^*
Department of Chemistry and Centre for Research in Mass Spectrometry, York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3. E-mail:

ABSTRACT:

Fragmentation of collisionally-activated argentinated amines results in the formation of Ag⁺ and non-silver-containing ions. The latter are likely immonium ions that are formed after elimination of AgH and, when the ion structures permit, AgCH₃ or AgC₆H₅. The H, CH₃ and C₆H₅ groups are attached to the carbon alpha to the amino nitrogen, and are believed to be cleaved with the Ag in a 1,2-elimination. This hypothesis is supported by potential energy hypersurfaces calculated using density functional theory for the reactions involving methanamine and ethanamine.

Keywords: AgH, elimination, fragmentation, argentinated amines

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