Reason behind 6-ethyl-2-methyl-4-pentyloctane as inappropriate for below molecule should be explained. Concept introduction: The IUPAC name begins with prefix to designate the number of C atoms in the longest chosen parent alkane followed by the suffix −ane. Positions of side chains or substituents are indicated by lowest numeral places before prefix. The IUPAC system for nomenclature of straight hydrocarbon makes use of table given as follows: As per IUPAC recommendations, longest chain found in a continuous manner in a branched molecule is chosen as parent chain.

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Chapter NW1, Problem 16CTQ

(a)

Interpretation Introduction

Interpretation: Reason behind 6-ethyl-2-methyl-4-pentyloctane as inappropriate for below molecule should be explained.

Concept introduction:The IUPAC name begins with prefix to designate the number of C atoms in the longest chosen parent alkane followed by the suffix −ane. Positions of side chains or substituents are indicated by lowest numeral places before prefix.

The IUPAC system for nomenclature of straight hydrocarbon makes use of table given as follows:

As per IUPAC recommendations, longest chain found in a continuous manner in a branched molecule is chosen as parent chain.

(b)

Interpretation Introduction

Interpretation:Reason behind 3-methyl-5-isobutyldecane as inappropriate as inappropriate for below molecule should be explained.

Concept introduction:The IUPAC name begins with prefix to designate the number of C atoms in the longest chosen parent alkane followed by the suffix −ane. Positions of side chains or substituents are indicated by lowest numeral places before prefix.

The IUPAC system for nomenclature of straight hydrocarbon makes use of table given as follows:

As per IUPAC recommendations, all the side chains are named in alphabetical order.Names of branches that occur commonly as side chains are listed below:

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