The molecular formula C4H11N can represent various structural isomers of 1-degree amines.

Understanding 1-degree amines:
1-degree amines are organic compounds that contain an amino group (-NH2) attached to a carbon atom, which is directly bonded to only one other carbon atom. In other words, the amine group is attached to a primary carbon.

Structural Isomers:
Structural isomers are compounds that have the same molecular formula but differ in the arrangement of atoms within the molecule. In the case of C4H11N, we need to determine the different ways in which the atoms can be arranged to form 1-degree amines.

Step 1: Determine the possible carbon chain arrangements.
The molecular formula C4H11N suggests that there are four carbon atoms in the compound. These carbon atoms can be arranged in various ways to form different carbon chain structures.

Step 2: Attach the amino group.
In each carbon chain structure, the amino group (-NH2) needs to be attached to a primary carbon atom. This means that the carbon atom to which the amino group is attached should have only one other carbon atom bonded to it.

Possible 1-degree amine structures:
By following the above steps, we can identify the following possible 1-degree amine structures for the molecular formula C4H11N:

1. Butylamine: The amino group (-NH2) is attached to the primary carbon atom in a butyl chain (C4H9).
- Molecular structure: CH3CH2CH2CH2NH2

2. Isobutylamine: The amino group (-NH2) is attached to the primary carbon atom in an isobutyl chain (C4H9).
- Molecular structure: (CH3)2CHCH2NH2

3. Secondary butylamine: The amino group (-NH2) is attached to the primary carbon atom in a secondary butyl chain (C4H9).
- Molecular structure: CH3CH(NH2)CH2CH3

4. Cyclobutylamine: The amino group (-NH2) is attached to a carbon atom in a cyclobutyl ring structure.
- Molecular structure: (CH2)3NH2

Total: Hence, there are four possible structural isomers of 1-degree amines with the molecular formula C4H11N.

Five structural isomer