The number of different four-carbon alkyl groups exist has to be identified. Concept Introduction: Alkyl groups are named according to IUPAC nomenclature . The name is obtained considering the parent alkane name and replacing “-ane” with “-yl”. In naming branched chain alkyl groups, this becomes little complicated. Hence, IUPAC system for giving name to such larger groups names them by considering as if they were themselves a separate compound. Three rules are followed while naming the larger groups. Rule 1: Longest continuous chain which begins at the point of attachment of the alkyl group becomes the base name for the alkyl group. Rule 2: Base chain that is identified is numbered in a way beginning at the point of attachment. Rule 3: The substituents that are present in the base chain is listed in alphabetical order using the locant as prefixes whenever necessary.

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Chapter 12, Problem 12.91EP

(a)

Interpretation Introduction

Interpretation:

The number of different four-carbon alkyl groups exist has to be identified.

Concept Introduction:

Alkyl groups are named according to IUPAC nomenclature. The name is obtained considering the parent alkane name and replacing “-ane” with “-yl”. In naming branched chain alkyl groups, this becomes little complicated. Hence, IUPAC system for giving name to such larger groups names them by considering as if they were themselves a separate compound. Three rules are followed while naming the larger groups.

Rule 1:

Longest continuous chain which begins at the point of attachment of the alkyl group becomes the base name for the alkyl group.

Rule 2:

Base chain that is identified is numbered in a way beginning at the point of attachment.

Rule 3:

The substituents that are present in the base chain is listed in alphabetical order using the locant as prefixes whenever necessary.

(b)

Interpretation Introduction

Interpretation:

The number of different five-carbon alkyl groups exist has to be identified.

Concept Introduction:

Alkyl groups are named according to IUPAC nomenclature. The name is obtained considering the parent alkane name and replacing “-ane” with “-yl”. In naming branched chain alkyl groups, this becomes little complicated. Hence, IUPAC system for giving name to such larger groups names them by considering as if they were themselves a separate compound. Three rules are followed while naming the larger groups.

Rule 1:

Longest continuous chain which begins at the point of attachment of the alkyl group becomes the base name for the alkyl group.

Rule 2:

Base chain that is identified is numbered in a way beginning at the point of attachment.

Rule 3:

The substituents that are present in the base chain is listed in alphabetical order using the locant as prefixes whenever necessary.

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