In the study of chlorination of propane, four prouducts A, B, C, and D of the formula `C_(3)H_(6)C1_(2)` were isloated. Each of then was further chlorinated to provide trichloro products, `C_(3)H_(5)C1_(3)` . It was found that A provided one trichloro product, B gave two, and C and D each gave three. What the structural of A, B, C, and D ?

Explanation

To determine the structures of products A, B, C, and D formed from the chlorination of propane, we can follow these steps:

### Step 1: Understand the chlorination of propane
Propane (C₃H₈) can undergo chlorination in the presence of chlorine (Cl₂) and light, leading to the substitution of hydrogen atoms with chlorine atoms. The products formed will be dichlorinated derivatives of propane.

### Step 2: Identify the possible dichlorinated products
The formula for the dichlorinated products is C₃H₅Cl₂. The four possible structures can be derived from the different positions of the chlorine atoms on the propane molecule.

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