Question

Classify each structure according to its functional class. For parts C and D, also indicate if the group is 1 degree, 2 degree, or 3 degree.

Answer 1

Concepts and reason

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.

Fundamentals

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 $- {\rm{N}}{{\rm{H}}_2}$ .

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

Where R is an alkyl group.

• Amide: It is represented as $- {\rm{CON}}{{\rm{H}}_2}$ . 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