The main product of the following reaction
`R-COOH+CH_(2)N_(2)to`Product

Options

A. `R-CONH_(2)`
B. `R-CN`
C. `R-COOCH_(3)`
D. `R-COONH_(4)`

Explanation

To determine the main product of the reaction between a carboxylic acid (R-COOH) and diazomethane (CH₂N₂), we can follow these steps:

### Step 1: Identify the Reactants
The reactants are:
- R-COOH (a carboxylic acid)
- CH₂N₂ (diazomethane)

### Step 2: Understand the Nature of Diazomethane
Diazomethane (CH₂N₂) can decompose upon heating to form a carbene (CH₂) and nitrogen gas (N₂). The structure of diazomethane is CH₂-N₂, where the nitrogen-nitrogen bond is weak and can break down to release N₂.

### Step 3: Formation of Carbene
When diazomethane is heated, it generates a carbene (CH₂) which is a highly reactive species. This carbene is known as a singlet carbene and acts as an electrophile.

### Step 4: Electrophilic Attack on the Carboxylic Acid
The carbene (CH₂) will react with the carboxylic acid (R-COOH). The electrophilic carbene will attack the carbonyl carbon of the carboxylic acid, leading to the formation of a new bond.

### Step 5: Product Formation
The reaction results in the formation of a new compound where the carbene has inserted itself into the -OH bond of the carboxylic acid. This leads to the formation of an ester-like product, specifically:
- R-COOCH₃ (where the -OH group of the carboxylic acid is replaced by a -CH₃ group from the carbene).

### Final Product
The main product of the reaction is R-COOCH₃, which can also be represented as RCOO-CH₃ or simply RCOOCH₃.

### Summary
The main product of the reaction between R-COOH and CH₂N₂ is RCOOCH₃.

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