In the reaction sequence Cyclohexane
`overset(hv//Cl_2)(rarr)(A)overset(alk.KOH//Delta)(rarr)(B)underset((ii)Zn//H_2O)overset((i)O_3)(rarr)`. 'C' will be

Options

A. Hexanal
B. 2-Hexanone
C. 3-Hexanone
D. Hexane-1,6-dial

Answer

To solve the problem step by step, we will analyze the reaction sequence given in the question.

### Step 1: Identify the Reaction with Chlorine
The first step involves the chlorination of cyclohexane using chlorine gas (Cl₂) in the presence of light (hv). This process is known as free radical halogenation, which typically results in the substitution of a hydrogen atom with a chlorine atom.

**Reaction:**
\[ \text{Cyclohexane} \xrightarrow{hv, Cl_2} \text{Chloro-cyclohexane (A)} \]

### Step 2: Dehydrohalogenation with Alcoholic KOH
In the second step, we treat the chloro-cyclohexane (A) with alcoholic potassium hydroxide (KOH) and heat (Δ). This reaction leads to the elimination of HCl, resulting in the formation of an alkene.

**Reaction:**
\[ \text{Chloro-cyclohexane (A)} \xrightarrow{alc. KOH, \Delta} \text{Cyclohexene (B)} \]

### Step 3: Ozonolysis of Cyclohexene
The third step involves ozonolysis, where cyclohexene (B) is treated with ozone (O₃) followed by reduction with zinc (Zn) and water (H₂O). Ozonolysis cleaves the double bond in the alkene, forming carbonyl compounds.

**Reaction:**
\[ \text{Cyclohexene (B)} \xrightarrow{O_3/Zn, H_2O} \text{Hexane-1,6-dial (C)} \]

### Step 4: Identify the Product C
From the ozonolysis of cyclohexene, we obtain two aldehyde groups at the 1 and 6 positions of the carbon chain, resulting in hexane-1,6-dial.

**Final Product:**
\[ \text{C} = \text{Hexane-1,6-dial} \]

### Conclusion
The final product C after the entire reaction sequence is hexane-1,6-dial.

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