Propyne on ozonolysis gives .........

Answer

To solve the question "Propyne on ozonolysis gives .........", we will follow these steps:

### Step 1: Understand the structure of Propyne
Propyne is an alkyne with the molecular formula C₃H₄. Its structure can be represented as:
\[ \text{CH}_3\text{C} \equiv \text{C} \]
This indicates that there is a triple bond between the second and third carbon atoms.

### Step 2: Perform Ozonolysis
Ozonolysis is a reaction where ozone (O₃) is used to cleave double or triple bonds in alkenes or alkynes, resulting in the formation of carbonyl compounds. In the case of propyne, the ozonolysis will break the triple bond.

### Step 3: Draw the reaction with Ozone
When propyne reacts with ozone, the triple bond will be cleaved, and ozone will insert itself into the bond. The reaction can be represented as:
\[ \text{CH}_3\text{C} \equiv \text{C} + O_3 \rightarrow \text{(intermediate)} \]

### Step 4: Hydrolysis of the Ozonide
After the formation of the ozonide intermediate, the ozonide is then treated with water (hydrolysis) to yield carbonyl compounds. The ozonide will break down into:
- One molecule of acetaldehyde (CH₃CHO)
- One molecule of formaldehyde (HCHO)

### Step 5: Final Products
Thus, the final products of the ozonolysis of propyne are:
- Acetaldehyde (CH₃CHO)
- Formaldehyde (HCHO)

### Conclusion
So, when propyne undergoes ozonolysis, it gives acetaldehyde and formaldehyde.

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