Reference mass spectra and analytical correlations for 20 alkylcycloalkyl sulfides and two dicycloalkyl sulfides are presented to provide information that will facilitate the identification of sulfur compounds occurring in natural or synthetic mixtures. Reference spectra indicate relative intensities in addition to parent and base peak sensitivities. Analytical correlations establish the ionic species that reflect major fragmentation paths for the compounds studied. Specifically, the correlations show that these base peaks are formed by several different processes: (1) cleavage of the bond a to the ring, (2) fragmentation of the aklyl chain, and (3) fragmentation of the ring plus fragment contribution from the alkyl chain. Useful correlations for determining alkyl chain length involve the cnh2n+3s+ and cnh2n+1+ ions. Cnh2n-2+ and cnh2n-1s+ ions reveal the number of carbon atoms in the cyclic ring. Other important ionic species are also discussed. Work done in cooperation with the American Petroleum Institute.
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