Negative chemical ionisation and collision induced fragmentations of deprotonated hydroperoxides

✍ Scribed by Pedro Domingues; Mário M. Q. Simões; Ana M. Cardoso; Ana M. V. Cavaleiro; José A. S. Cavaleiro; Robert A. W. Johnstone; A. J. Ferrer-Correia

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 56 KB
• Volume: 13
• Category: Article
• ISSN: 0951-4198
• DOI: 10.1002/(sici)1097-0231(19990130)13:2<93::aid-rcm458>3.0.co;2-l

✦ Synopsis

The mass spectra and the collisional induced dissociations (CID) of deprotonated hydroperoxides, generated by negative chemical ionisation (NCI) with methane as ionising reagent, have been examined. The chemical ionisation mass spectra of hydroperoxides show that the base peak corresponds to the [(MÀH)ÀO] À ion for all the compounds studied with the exception of t-butyl hydroperoxide. The O 2 H À ion is present in the spectra of all of these compounds that do not possess a phenyl group. This study provides detailed information on the fragmentation behaviour of deprotonated hydroperoxides, [MÀH] À . The presence of the O 2 H À ion in the CID spectra of the deprotonated molecules produced by NCI with methane can be used as a fingerprint for hydroperoxides in functional group identification.