Which of the following reactions will not result in the formation of carbon- carbon bond?

Options

A. Cannizzaro's Reaction
B. Wurtz Reaction
C. Reimer - Tiemann Reaction
D. Friedel-Crafts Reaction.

Explanation

To determine which of the following reactions will not result in the formation of a carbon-carbon bond, we need to analyze the given options.

### Step-by-Step Solution:

1. **Understanding Carbon-Carbon Bond Formation**:
- A carbon-carbon bond is formed when two carbon atoms are connected through a covalent bond. In organic reactions, this typically occurs in reactions such as aldol condensation, Grignard reactions, or reactions involving alkenes and alkynes.

2. **Analyzing the Cannizzaro Reaction**:
- The Cannizzaro reaction involves the disproportionation of non-enolizable aldehydes in the presence of a strong base (like sodium hydroxide).
- In this reaction, one molecule of the aldehyde is oxidized to a carboxylic acid (or its sodium salt), while another molecule is reduced to an alcohol.
- The reaction can be summarized as follows:
\[ 2 RCHO \xrightarrow{NaOH} RCOONa + RCH2OH \]
- Here, no new carbon-carbon bonds are formed; instead, the existing carbon atoms are rearranged into different functional groups.

3. **Conclusion**:
- Since the Cannizzaro reaction does not involve the formation of a new carbon-carbon bond, it is the correct answer to the question.

### Final Answer:
The reaction that will not result in the formation of a carbon-carbon bond is the **Cannizzaro reaction**.

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