Study of the fragmentation pathways of dimethyl disulfide derivative of 2-methyl-1,4-pentadiene by GC/MS to locate the double bonds in substituted unsaturated compounds

C. Pepe; H. Sayer; S. Ledoux; J. Dagaut

doi:doi:10.1051/analusis:1999115

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Volume 27 / No 3 (April 1999)

Analusis, 27 3 (1999) 255-258

Abstract

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Issue		Analusis Volume 27, Number 3, April 1999 Isotopic analysis


Page(s)		255 - 258
Section		Original articles
DOI		https://doi.org/10.1051/analusis:1999115

Analusis 27, 255-258 (1999)
DOI: 10.1051/analusis:1999115

Study of the fragmentation pathways of dimethyl disulfide derivative of 2-methyl-1,4-pentadiene by GC/MS to locate the double bonds in substituted unsaturated compounds

C. Pepe¹, H. Sayer¹, S. Ledoux² and J. Dagaut³

¹ Laboratoire de Spectrochimie Moléculaire, Université P. et M. Curie, case 49, 75252 Paris Cedex 5, France
² Laboratoire de Chimie des heterocycles, Université P. et M. Curie, case 49, 75252 Paris Cedex 5, France
³ Laboratoire de Physique et Chimie Marines, Université P. et M. Curie, case 134, 75252 Paris Cedex 5, France

Abstract
An experimental study has employed to examine the loss of CH₃SH from the dimethyl disulfide (DMDS) derivative of 2-methyl-1,4-pentadiene (cyclic thioether). This loss is particulary important to locate the double bonds in mono, di and tri-unsaturated compounds after addition of DMDS. This work shows that the migration of a H atom in the $\beta$ or in a other position relative to the sulfur atom is possible. This result shows that this method of the location of the double bonds in unsaturated compounds is also possible when the carbon atoms in the $\beta$ -position relative to the sulfur atom are substituted.