El. Oiestad et E. Uggerud, Competition between proton transfer and hydride abstraction in chemical ionisation mass spectrometry of ethylamine, INT J MASS, 199(1-3), 2000, pp. 91-105
The reactions between ethylamine and two different proton donors (protonate
d water and protonated molecular nitrogen) have been investigated experimen
tally and theoretically. Proton transfer to the amino group yields protonat
ed ethylamine, which may subsequently fragment via four different unimolecu
lar reaction channels (loss of NH3, C2H4, CH4, and H-2). However, the obser
ved losses of CH4 and H-2 are better explained by mechanisms where CH3- and
H-, respectively, are abstracted directly in an encounter between the prot
on donor and ethylamine. (Int J Mass Spectrom 199 (2000) 91-105) (C) 2000 E
lsevier Science B.V.