Allyl monosulfide

Synonyms Allyl monosulfide Diallyl monosulfide Diallyl sulfide Diallylthioether Oil garlic ... 

Most monosulfides generally have very low transfer constants. Exceptions to this rule are allyl sulfides (Section 6,2.3.2) and thiocarbonylthio compounds such as the trithiocarbonatcs and dithiocstcrs (Section 9.5.3) that react by an addition-fragmentation mechanism. 

Sulfur. Low sulfur stocks and EV sulfur-accelerated systems have better aging resistance. Normally, the oxidation rate increases with the amount of sulfur used in the cure. The increased rate may be due to activation of adjacent C—H groups by high levels of combined sulfur. Saturated sulfides are more inert to oxidation than allylic sulfides. Polysulfidic cross-links impart excessive hardening of SBR as compared to more stable monosulfidic cross-links. 

All possible combinations of methyl, propyl, allyl, and 1-propenyl disulfides (primarily), monosulfides, and trisulfides have been found among the volatile flavor components of onion (28,29, 30,31), garlic (32), caucas Allium victorialis) (33), and other Allium species 28) although proportions vary with species. These compounds are presumably derived from the corresponding thiolsulfinates. This is accomplished either by direct decomposition by an unknown mechanism with evolution of SO2 (32) or by interaction with cysteine to produce a mixed disulfide (15),... 

Diallyl monosulfide. SeeAllyl sulfide Diallyl 2,2 -oxydiethyl dicarbonate. See Diethylene glycol bis (allyl carbonate)... 

Monex . See Tetramethylthiuram monosulfide Monguard. See 6-(3,5-Dichloro-4-methylphenyl)-3(2H)-pyridazinone Monoacetina. See Glyceryl acetate Monoacetylcellulose. See Cellulose acetate Monoallylamine. See Allyl amine Monoallylurea. See Allyl urea Mono (2-aminoethyl) sulfate. See Aminoethyl sulfate... 

Schemes 3, 4 and reaction (5) readily explain the shortfall in thermal stability of monosulfide crosslinks compared to carbon-carbon crosslinks. The origin of the lower stability is seen to lie in reaction paths which are not available to the latter (reactions 3 and 4, Scheme 3) or in paths for which the energy gain in the formation of analogous products would be less (Scheme 4, reaction 5), All the reactions clearly depend upon the presence of alkenic unsaturation allylic to the sulfur atom. The corresponding saturated sulfides should be much more stable and a technically feasible way of introducing such crosslinks into polyisoprene is highly desirable.

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