Question

Isoprene is:
(A) 3-methyl-1,2-butadiene
(B) 2-methyl-1,3-butadiene
(C) 3-chloro-1, -butadiene
(D) 2-chloro-1,3-butadiene

Answer 1

Hint: Isoprene is mainly used in manufacturing of rubber. It is an unsaturated hydrocarbon with a methyl group.

Complete step by step answer:
The structure of isoprene is –



So, the name of this structure will be 2-methyl-1,3-butadiene.So, option B is correct.

Additional information:
It is an unsaturated hydrocarbon produced by many plants and animals. It is a colourless, volatile liquid in its pure form. Polymer of isoprene is a main component in production of natural rubber.
Natural Rubber and Synthetic Rubber are two types of rubber —
Natural rubbers are made up of solid particles suspended in a milky white liquid. They are found dripping from the bark of tropical and subtropical trees. We also call it Latex. It is made by the polymerization of isoprene i.e. 2-methyl-1,3-butadiene. They are made by loosely joining the monomers of isoprene in the form of a long chain.



The polymeric chains in rubber contain between 320 and 35,000 isoprene units bound together with double bonds. This makes the chains stretchy. Large quantities of isoprene are used industrially today, nearly all of it to make synthetic rubber, and it is produced by the petroleum industry through cracking oil. Due to its outstanding mechanical properties and low cost, isoprene rubber is the preferred material for many engineering applications.

Note: Polymers of isoprene are mainly used in making of tires, anti-vibration mounts, drive couplings, bearings, and adhesives.