Fragmentation of 1- and 3-metroxypropene ions another part of the C 4H 8O + [rad] potential energy surface

Abstract

The fragmentation mechanisms of metastable ionized 1- and 3-methoxypropene have been examined in detail by using ionization and appearance energy measurements metastable ion and collisional activation mass spectra, and a variety of isotopically labeled molecules. These metastable C 4H 8O + ions fragment by loss of H , CH 3, and H 2CO, and the experimental observations allowed the construction of the potential energy diagram which describes their interconversion and the participation of four other distonic and carbene C 4H 8O + ions. It was found that these two methyl alkenyl ether ions had no common reaction channel with either the 2-methoxy isomer or with any of the alcohol, keto, or enol C 4H 8O + isomers which previously have been extensively studied.