Why Grignard reagents are not used in place of dialkyl cadmium during the preparation of ketones from acid chlorides ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Reactants**:
- We start with an acid chloride (RCOCl) and want to prepare a ketone. The common reagents for this transformation are dialkyl cadmium (R2Cd) and Grignard reagents (RMgX).

2. **Role of Dialkyl Cadmium**:
- When dialkyl cadmium is used, it reacts with the acid chloride to form a ketone (R-C(=O)-R'). The reaction proceeds smoothly without any side reactions, as cadmium does not react further with the ketone product.

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