The final product formed when ethyne and acetic acid react is

Options

A. vinyl acetate
B. Ethyl acetate
C. Acetylene acetic acid
D. Ethylidene acetate

Answer

To determine the final product formed when ethyne (C2H2) reacts with acetic acid (CH3COOH), we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Ethyne (C2H2)
- Acetic acid (CH3COOH)

### Step 2: Understand the Reaction Mechanism
Ethyne, being an alkyne, can undergo reactions with acids. In this case, acetic acid can react with ethyne in the presence of a catalyst, typically a metal salt like mercuric acetate (Hg(OAc)2), to form a vinyl acetate.

### Step 3: Reaction of Ethyne with Acetic Acid
When ethyne reacts with acetic acid, the following occurs:
1. The triple bond in ethyne is converted to a double bond.
2. The acetic acid contributes to the formation of an ester.

The reaction can be summarized as follows:
\[ \text{C}_2\text{H}_2 + \text{CH}_3\text{COOH} \rightarrow \text{CH}_3\text{C} \equiv \text{C} \text{O} \text{O} \text{H} \]

### Step 4: Identify the Final Product
The final product formed from this reaction is vinyl acetate (CH2=CH-O-C(=O)CH3). This compound has a double bond between the carbon atoms and an ester functional group.

### Final Product:
The final product formed when ethyne and acetic acid react is **vinyl acetate**.

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