An-Najah National University
Question
Asked 29th Sep, 2017
Reaction mechanism of vulcanization acceleratored by Benzothiazole Sulfenamide?
There are many different mechanism proposed in the literature. The mechanism shown in the figure is accepted by many authors. The question is how two hydrogen atom supplied to form MBT and Cyclohexylamine from CBS?
![](profile/Afshin-Tavasoli/post/Reaction-mechanism-of-vulcanization-acceleratored-by-Benzothiazole-Sulfenamide/attachment/59d627616cda7b8083a24953/AS%3A543871152201728%401506680395218/image/MBTS.png)
All Answers (2)
Obviously, the first cleavage step required adding 2H. The second combination step b/w MBT & CBS involved elimination of cyclohexylamine "from CBS" but the H in (-SH) of MBT has gone to form full molecule of the amine.
There are hydrogenation/dehydrogenation reactions in the first two steps. What surprised industrial organic chemists that dehydrogenation, like hydrogenation, is enhanced by the presence of hydrogen right from the start.