ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The mass spectra of some alkyl thioureas, alkyl-aryl and aryl thioureas are presented and discussed. The main primary fragmentation pathways are cleavage next to the central carbon atom, with the charge residing on either fragment, and the loss of sulphydryl or substituted sulphydryl radicals. The differences in behaviour of the methyl ureas and thioureas are discussed on the basis of a preferred charge location on sulphur in the thioureas but on nitrogen in the ureas. Also, where appropriate, the spectra of all the alkyl compounds are compared with those of the alkyl guanidines. The effect of chain length of alkyl groups and of charge location on the fragmentation pattern is discussed using the spectra of the ethyl and butyl thioureas and the ethyl ureas. The sensitivity of alkyl thioureas to pyrolysis is noted and the sensitivity of phenyl substituted thioureas to pyrolysis confirmed.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210040109
Permalink