Chapter 10.SE, Problem 23AP

Interpretation Introduction

a) 2,3-Dichloro-4-methylhexane

Interpretation:

The structure corresponding to the IUPAC name 2,3-dichloro-4-methylhexane is to be given.

Concept introduction:

The longest continuous carbon chain in the molecule is chosen. The chain is numbered from the end which gives lowest number to the substituent either halo or alkyl group present. If different halogens are present they are numbered and listed in the alphabetical order while writing the name. If same two alternatives exist for different substituents, then the chain is numbered from the end that gives lowest number to the substituent that has alphabetical preference.

To give:

The structure corresponding to the IUPAC name 2,3-dichloro-4-methylhexane.

Interpretation Introduction

b) 4-Bromo-4-ethyl-2-methylhexane

Interpretation:

The structure corresponding to the IUPAC name 4-bromo-4-ethyl-2-ethylhexane is to be given.

Concept introduction:

The longest continuous carbon chain in the molecule is chosen. The chain is numbered from the end which gives lowest number to the substituent either halo or alkyl group present. If different halogens are present they are numbered and listed in the alphabetical order while writing the name. If same two alternatives exist for different substituents, then the chain is numbered from the end that gives lowest number to the substituent that has alphabetical preference.

To give:

The structure corresponding to the IUPAC name 4-bromo-4-ethyl-2-methylhexane.

Interpretation Introduction

c) 3-Iodo-2,2,4,4-tetramethylpentane

Interpretation:

The structure corresponding to the IUPAC name 3-iodo-2,2,4,4-tetramethylpentane is to be given.

Concept introduction:

The longest continuous carbon chain in the molecule is chosen. The chain is numbered from the end which gives lowest number to the substituent either halo or alkyl group present. If different halogens are present they are numbered and listed in the alphabetical order while writing the name. If same two alternatives exist for different substituents, then the chain is numbered from the end that gives lowest number to the substituent that has alphabetical preference.

To give:

The structure corresponding to the IUPAC name 3-iodo-2,2,4,4-tetramethylpentane.

Interpretation Introduction

d) cis-1-Bromo-2-ethycyclopentane

Interpretation:

The structure corresponding to the IUPAC name cis-1-bromo-2-ethylcyclopentane is to be given.

Concept introduction:

The number of carbon atoms present in a cycloalkane ring determine the parent name of the cycloalkane. If substituents are present the ring is numbered in such a way that lowest number is given to the substituents. While writing the name the substituents are arranged first in their alphabetical order followed by the parent name.

To give:

The structure corresponding to the IUPAC name cis-1-bromo-2-ethylcyclopentane.