Question

The following two hydrocarbons have been isolated from various plants in the sunflower family. Name them according to IUPAC rules.

Short answer

The structure of the given compounds are:

(a)

(b)

Step-by-step solution

Definition of IUPAC nomenclature

A standard rules had been defined by IUPAC for the naming of organic compounds.

Given below is a general procedure for write names in organic chemistry

Prefix-2 (substituents) + prefix-1(cyclo) + number of carbon + suffix–1 (ane/ene/yne) + suffix -2 (functional groups)

Name of the given organic compound in part (a)

By using the above mentioned rules we can write the name of given organic compound – Trideca-1,3,5,11-tetraene-7,9-yne

Name of the given organic compound in part (b)

By using the above-mentionedrules, we can write the name of given organic compound – Trideca-1-ene-3,5,7,9,11-pentayne