Abstract The experimental conditions developed for the detection of rather stable radical cations in solution by electrospray-ionization mass spectrometry (ESI-MS) of a Fe II complex of 2-amino-5, 6, 7, 8-tetrahydro-5-methylpteridin-4 (3H)-one (1c) are used to observe the formation of the more unstable radical cations formed from 2-amino-5, 6, 7, 8- tetrahydropteridin-4 (3H)-one (1a) and tris (pentane-2, 4-dionato) iron (III)([Fe III (acac) 3]; ...
