Aniline reacts with excess `Br_(2)//H_(2)O` to give the major product

Options

A. 1. 2-bromoaniline
B. 2. 4-bromoaniline
C. 3. 2,4-dibromoaniline
D. 4. 2,4,6-tribromoaniline

Explanation

To determine the major product of the reaction between aniline and excess bromine in water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of Aniline**:
- Aniline is an aromatic amine with the chemical formula C6H5NH2. Its structure consists of a benzene ring attached to an amino group (-NH2).

**Hint**: Draw the structure of aniline to visualize the functional groups and the aromatic ring.

2. **Understand the Reactivity of Aniline**:
- The amino group (-NH2) is an electron-donating group due to its lone pair of electrons. This increases the electron density of the benzene ring, making it more reactive towards electrophilic substitution reactions, such as bromination.

**Hint**: Recall that electron-donating groups activate the benzene ring towards electrophilic substitution.

3. **Draw Resonance Structures**:
- Aniline can exhibit resonance. The lone pair on the nitrogen can delocalize into the benzene ring, creating several resonance structures. This delocalization increases the reactivity of the ortho and para positions on the ring.

**Hint**: Consider how the lone pair on the nitrogen can participate in resonance with the benzene ring.

4. **Identify Possible Bromination Sites**:
- Due to the resonance stabilization, the ortho (2-position) and para (4-position) positions of the benzene ring are activated for substitution. The bromine can attack these positions.

**Hint**: Mark the ortho and para positions on the benzene ring where bromination can occur.

5. **Consider Excess Bromine**:
- Since excess bromine is used, multiple bromination can occur. The major product will likely be the one with bromine substituents at both the ortho and para positions.

**Hint**: Think about how excess bromine will lead to multiple substitutions rather than just one.

6. **Determine the Major Product**:
- The major product formed will be 2,4,6-tri-bromoaniline, as bromination occurs at both ortho and para positions, and with excess bromine, it can also brominate at the meta position.

**Hint**: Remember that the presence of excess bromine favors the formation of a fully brominated product.

### Final Answer:
The major product of the reaction of aniline with excess bromine in water is **2,4,6-tri-bromoaniline**.