Interpretation:
To propose the steps for the formation of vestenamer and norsorex by olefin metathesis
Concept introduction:
Vestenamer and norsorex can be obtained by the olefin metathesis polymerization. An olefin metathesis reaction can be stated as the reaction between two molecules (
The catalyst used for olefin metathesis polymerization is Grubb ’s catalyst (it contain a carbon-metal double bond and have a genral structure as M=CH-R. The function of Grubb’s catalyst is to react reversibly with an alkene to form a four membered cyclic compound knowa as metallacycle. Here, “M” is Ru i.e. ruthenium.
Metallacycle opens up in the next step to give rise to different alkene and a different catalyst.
Vestenamer, is produced by cyclooctene by the process of ROMP (Ring openeing polymerization process), also known as TOR (trans-polyoctenamer). It is also used as an blending material to impart greater elasticity and durability to other rubbers.
Norsorex is also known as 90% of the trans
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