Write the hydrogenation product of following species
Benzoylchloride `overset(H_(2)//Pd//BaSO_(4))rarr`

Answer

To determine the hydrogenation product of benzoyl chloride in the presence of hydrogen and palladium on barium sulfate, we can follow these steps:

### Step 1: Identify the Reactant
The reactant given is benzoyl chloride, which has the following structure:

- **Benzoyl Chloride Structure**: C6H5C(O)Cl

This consists of a benzene ring (C6H5) attached to a carbonyl group (C=O) and a chlorine atom (Cl).

### Step 2: Understand the Reaction Conditions
The reaction is carried out in the presence of hydrogen (H2) and a catalyst, which is palladium (Pd) supported on barium sulfate (BaSO4). This specific method of hydrogenation is known as Rosenmund reduction, which selectively reduces acyl chlorides to aldehydes.

### Step 3: Apply the Rosenmund Reduction
In the Rosenmund reduction, the acyl chloride (in this case, benzoyl chloride) is reduced to an aldehyde. The chlorine atom is replaced by a hydrogen atom.

### Step 4: Write the Product
When benzoyl chloride undergoes hydrogenation, the product formed is benzaldehyde. The structure of benzaldehyde is:

- **Benzaldehyde Structure**: C6H5C(O)H

This shows that the chlorine atom has been replaced by a hydrogen atom, resulting in the formation of benzaldehyde.

### Final Answer
The hydrogenation product of benzoyl chloride is **benzaldehyde**.

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