Problem: Classify Each Structure According To Its Functional Class.

Classify each structure according to its functional class. Forparts C and D, also indicate if the group is 1 degree, 2 degree, or3 degree.

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The structures of several molecules are given and the functional groups need to be identified. The groups responsible for the characteristic chemical properties of a molecule are known as functional groups.

Skeletal structure: The skeletal formula represents the bonding of different atoms with each other and shows the basic skeleton of the molecule.

The several groups that a molecule can possess are listed below:

• Alkyl halide: When a halogen is directly attached to carbon atom, then it is known as alkyl halide. They are represented as R-X, where R is an alkyl group and X represents halogen.

• Amine: It is represented as −NH2 – {
m{N}}{{
m{H}}_2}−NH2​ .

• Carboxylic acid: It is represented as -COOH. It is shown as follows:

Where R is an alkyl group.

• Amide: It is represented as −CONH2 – {
m{CON}}{{
m{H}}_2}−CONH2​ . It is shown below:

Part A.

The functional group present in the molecule is carboxylic acid.

Part B

The functional group present in the molecule is alkyl halide.

Part C

The functional group present in the molecule is amide (secondary).

Part D

The functional group present in the molecule is amine (tertiary).

Ans: Part A

Part B

Part C

Part D

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