Chapter 12, Problem 12.40AP

(a)

Interpretation Introduction

Interpretation:

A six carbon alkane with 2 tertiary carbons has to be given.

Concept Introduction:

Alkanes are the class of hydrocarbons which have the general formula ${\text{C}}_{\text{n}}{\text{H}}_{\text{2n+2}}$.  There is only single bond present in alkanes.

Tertiary carbon:

A carbon can be termed as tertiary if it is attached to other three carbon atoms or groups.

(b)

Interpretation Introduction

Interpretation:

Three different cyclohexanes with two methyl groups attached has to be given.

Concept introduction:

Cycloalkanes are named as alkyl-substituted cycloalkanes rather than as cycloalkyl-substituted alkanes. There is no need to assign a number if there is one substituent on the ring.

Substituent:

It may directly or indirectly attach to the main Carbon chain.

It may be any Functional group.