Question

Give IUPAC names for the following carboxylic acids (reddish brown = Br);

Short answer

The IUPAC names of the given compounds can be found.

Step-by-step solution

Finding IUPAC name for the compound (a)

The compound model can be represented as,

It is the derivative of benzoic acid with the atom of bromine on C₃ and group of methoxyl on C₄. The IUPAC name can be named as 3-bromo 4-methoxybenzoic acid.

Finding IUPAC name for the compound (b)

The compound model can be represented as,

It is an unsaturated acid with 4 carbon straight chain in addition to the presence of double bond between C₂ and C₃. The IUPAC name can be named as 3-methyl 2-butenoic acid.

Finding IUPAC name for the compound (c)

The compound model can be represented as,

It has cyclopentadiene ring which attaches the carboxyl group.

The double bond present between C₁ and C₂ & C₃ and C₄. The IUPAC name can be named as cyclopentane 1,3-dienecarboxylic acid.

Finding IUPAC name for the compound (d)

The compound model can be represented as,

It is a carboxylic acid with the 3 carbon straight chain which attaches methyl group to C₂ and cyclopentyl group to C₃. This has C₂ chiral carbon with optically active compound.

The first highest, second and third consecutive groups can be viewed in the anti-clockwise direction.

The IUPAC name can be named as (S)-3-cyclopentyl-2-methylpropanoic acid.