Reactions of ionised methyl pent-4-enyl ether, CH2CH(CH2)3OCH3·+11Dedicated to Professor Nico Nibbering on the occasion of his imminent retirement in recognition of his outstanding contributions to gas-phase ion chemistry.

The reactions of CH2CH(CH2)3OCH3·+ are reported and discussed, with particular emphasis on the behaviour of the metastable ions. The main reactions of the low energy title ions are elimination of CH3·, C2H5·, and CH3OH, each occurring at similar rates; but loss of H2O, H· and, to a lesser degree, C2H4, also occurs. The mechanisms of these reactions have been probed by examining collision-induced dissociation spectra and by extensive D-labeling …