Chapter 4, Problem 4.66P

Interpretation Introduction

Interpretation:

All the constitutional isomers of $\text{cis-ethylmethylisopropylcyclohexane}$ are to be drawn, and the most stable isomer is to be identified.

Concept introduction:

Different compounds that have the same molecular formula are classified as isomers.

Constitutional isomers have the same molecular formula. They differ in the connectivity of the atoms. They do not interconvert and can be separated from each other. For substituted cyclohexane, the isomer having substituents at the equatorial position is most stable. Preferably the bulkier groups are more stable at the equatorial position than axial due to reduced in $\text{1-3}$ diaxial butane gauche interaction.