The main product of the following reaction is `C_(6)H_(5)CH_(2)(OH)CH(CH_(3))_(2)overset(Conc.H_(2)SO_(4))rarr`?

Options

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Answer

To determine the main product of the reaction of C6H5CH2(OH)CH(CH3)2 with concentrated H2SO4, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactant Structure**:
The reactant is C6H5CH2(OH)CH(CH3)2. This can be represented as:
- C6H5 is the phenyl group.
- CH2(OH) indicates a hydroxyl group (-OH) attached to a methylene group (CH2).
- CH(CH3)2 indicates a carbon (C) that is attached to two methyl groups (CH3).

2. **Understanding the Role of Concentrated H2SO4**:
Concentrated sulfuric acid (H2SO4) acts as a dehydrating agent. It can remove water (H2O) from the reactant, leading to the formation of a double bond.

3. **Dehydration Reaction**:
The hydroxyl group (-OH) can be protonated by the sulfuric acid, making it a better leaving group. The elimination of water will lead to the formation of a double bond between the carbon atoms adjacent to the hydroxyl group.

4. **Formation of the Double Bond**:
After the dehydration, the structure will change from:
- C6H5-CH2-CH(OH)-CH(CH3)2
to:
- C6H5-CH=CH-CH(CH3)2
This results in the formation of a double bond between the carbon that was attached to the hydroxyl group and the adjacent carbon.

5. **Stability of the Product**:
The product formed has the phenyl group (C6H5) conjugated with the double bond (C=CH). This conjugation provides additional stability to the product due to resonance.

6. **Identify the Main Product**:
Among the possible products, the one with the phenyl group conjugated with the double bond is more stable. Therefore, the main product of the reaction is:
- C6H5-CH=CH-CH(CH3)2

### Final Answer:
The main product of the reaction is C6H5-CH=CH-CH(CH3)2.