Naslov
The gas-phase interactions of TEMPO radicals with Fe+ ions

Autori
Kazazić, Snježana P. ; Klasinc, Leo ; Rožman, Marko ; Srzić, Dunja

Izvornik
RCM. Rapid communications in mass spectrometry (0951-4198) 22 (2008), 13; 2104-2108

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
LDI FTMS ; TEMPO ; DFT calculations ; metal ion ligation

Sažetak
The gas phase ligation of 2, 2, 6, 6-tetramethyl-piperidyl-1-oxide (TEMPO) radical (1) and its 4- hydroxy- derivative (2) with Fe+ ions in a 3T FT ICR mass spectrometer was investigated. Triple ligation may occur: the first ligation produces a transient species prone to either charge exchange or a stable second ligation ; the third ligand adds slowly, with fragmentation. 1 and 2 differ in that 1 binds exclusively at the nitroxyl oxygen while 2 also binds at the OH site after the loss of a H-radical. Calculations combined with steric considerations support such a mechanism for 2. The site and the mechanism of the important side reaction of 1 that involves OH addition from a water impurity to yield an FeR2+ species remain unexplained.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA