Q7-22E Name the following alkenes, and ... [FREE SOLUTION]

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Chapter 7: Q7-22E (page 219)

Name the following alkenes, and convert each drawing into a skeletal structure:

Short Answer

Expert verified

a) The name of the given structure is 2, 4, 5-trimethylhex-2-ene

b) The name of the compound is 1-Ethyl-3,3-dimethylcyclohexene

Step by step solution

Step-by-Step solutionStep 1: Nomenclature of alkenes

Compounds with two double bonds are denoted as dienes. These alkenes can be further categorized into cumulated, conjugated, and isolated dienes.

Naming the alkenes and converting them to a skeletal structure

(a) The given compound has six carbon atoms in the main chain with alkene at the second position. So the given compound is hex-2-ene. It has a methyl group at the second, fourth, and fifth positions. Hence, the name of the compound is 2, 4, 5-trimethylhex-2-ene.

The skeletal structure of the compound can be given as:

Skeletal structure of the compound (a)

Naming the alkenes and converting them to a skeletal structure

(b) The given compound is a cyclic compound with six carbon atoms and a double bond. So the compound is named cyclohexene. There are two methyl groups as substituents in the third position and one ethyl group as the substituent in the first position.

Hence, the name of the compound is 1-Ethyl-3,3-dimethylcyclohexene.

The skeletal structure of compound (b) can be given as:

Skeletal structure of compound (b)