Chapter F, Problem F.5P

Interpretation Introduction

(a)

Interpretation:

The IUPAC name for the given compound is to be written.

Concept introduction:

The IUPAC name of a compound is made of three parts, prefix, root, and suffix. If the compound contains different functional groups, the highest priority group is determined. This determines the suffix. The longest continuous chain of carbons that contains the highest priority group forms the root. The final ‘e’ in the name of the corresponding alkane is replaced by the suffix corresponding to the highest priority group, except in case of nitriles, when the suffix ‘nitrile’ is simply added to the root name. The position (locant) of the highest priority group on the longest chain is inserted between the root name and the suffix unless redundant. The longest carbon chain is numbered in the direction that gives the highest priority group the lowest possible locant. If the root is a ring, the position of highest priority group is always 1. Any other low priority groups are treated as substituents and listed alphabetically in the prefix along with their locants. In case of rings, the numbering of ring carbons is done in the direction that gives the substituents the lowest possible locants. If more than one instance of any functional group (including highest priority) is present, their numbers are specified by adding a di, tri, etc. to the respective functional group name.

If any chiral carbons are present, their absolute configurations are determined on the basis of Cahn-Ingold-Prelog rules, and listed at the start along with the carbon number.

Interpretation Introduction

(b)

Interpretation:

The correct IUPAC name from the given structure is to be written.

Concept introduction:

The IUPAC name of a compound is made of three parts, prefix, root, and suffix. If the compound contains different functional groups, the highest priority group is determined. This determines the suffix. The longest continuous chain of carbons that contains the highest priority group forms the root. The final ‘e’ in the name of the corresponding alkane is replaced by the suffix corresponding to the highest priority group, except in case of nitriles, when the suffix ‘nitrile’ is simply added to the root name. The position (locant) of the highest priority group on the longest chain is inserted between the root name and the suffix unless redundant. The longest carbon chain is numbered in the direction that gives the highest priority group the lowest possible locant. If the root is a ring, the position of highest priority group is always 1. Any other low priority groups are treated as substituents and listed alphabetically in the prefix along with their locants. In case of rings, the numbering of ring carbons is done in the direction that gives the substituents lowest possible locants. If more than one instance of any functional group (including highest priority) is present, their numbers are specified by adding a di, tri, etc. to the respective functional group name.

If any chiral carbons are present, their absolute configurations are determined on the basis of Cahn-Ingold-Prelog rules, and listed at the start along with the carbon number.

Interpretation Introduction

(c)

Interpretation:

The IUPAC name for the given compound is to be written.

Concept introduction:

The IUPAC name of a compound is made of three parts, prefix, root, and suffix. If the compound contains different functional groups, the highest priority group is determined. This determines the suffix. The longest continuous chain of carbons that contains the highest priority group forms the root. The final ‘e’ in the name of the corresponding alkane is replaced by the suffix corresponding to the highest priority group, except in case of nitriles, when the suffix ‘nitrile’ is simply added to the root name. The position (locant) of the highest priority group on the longest chain is inserted between the root name and the suffix unless redundant. The longest carbon chain is numbered in the direction that gives the highest priority group the lowest possible locant. If the root is a ring, the position of highest priority group is always 1. Any other low priority groups are treated as substituents and listed alphabetically in the prefix along with their locants. In case of rings, the numbering of ring carbons is done in the direction that gives the substituents lowest possible locants. If more than one instance of any functional group (including highest priority) is present, their numbers are specified by adding a di, tri, etc. to the respective functional group name.

If any chiral carbons are present, their absolute configurations are determined on the basis of Cahn-Ingold-Prelog rules, and listed at the start along with the carbon number.