Cyclohexene on raction with cold dilute `KMnO_(4)` solutioon gives

Options

A. `(+-)-`trans`-1,2`-cyclohexanediol
B. `1,2-`cyclohexanediol
C. cis`-1,2-`cyclohexanediol
D. trans`-1,2-cyclohexanediol

Explanation

To solve the question regarding the reaction of cyclohexene with cold dilute KMnO4, we can follow these steps:

### Step 1: Identify the Reactants
We start with cyclohexene, which is an alkene with the molecular formula C6H10. It has a double bond between two carbon atoms in a six-membered ring.

**Hint:** Remember that cyclohexene is a cyclic compound with a double bond, which makes it reactive towards certain reagents.

### Step 2: Understand the Reaction Conditions
The reaction is carried out with cold dilute KMnO4. KMnO4 is known for its ability to perform syn-dihydroxylation of alkenes. This means that it adds hydroxyl (OH) groups across the double bond in a syn fashion (on the same side).

**Hint:** Syn-dihydroxylation results in the addition of two hydroxyl groups to the same side of the double bond.

### Step 3: Perform the Reaction
When cyclohexene reacts with cold dilute KMnO4, the double bond opens up, and two hydroxyl groups are added to the carbons that were involved in the double bond. This results in the formation of a diol.

**Hint:** Visualize the addition of OH groups to the double bond; they will be added to the same side of the ring.

### Step 4: Analyze the Product Structure
After the reaction, we get a compound where the two hydroxyl groups are added to adjacent carbon atoms (1 and 2 positions) in a cis configuration. This results in a meso compound because it has a plane of symmetry.

**Hint:** A meso compound has multiple stereocenters but is achiral due to its internal symmetry.

### Step 5: Name the Product
The product formed is 1,2-cyclohexanediol. Since the hydroxyl groups are added in a cis configuration, we can refer to it as cis-1,2-cyclohexanediol.

**Hint:** When naming diols, indicate the positions of the hydroxyl groups and whether they are in a cis or trans configuration.

### Final Answer
The product of the reaction of cyclohexene with cold dilute KMnO4 is **cis-1,2-cyclohexanediol**.

### Summary of Steps:
1. Identify the reactant (cyclohexene).
2. Understand the reaction conditions (cold dilute KMnO4).
3. Perform the reaction (syn-dihydroxylation).
4. Analyze the product structure (meso compound).
5. Name the product (cis-1,2-cyclohexanediol).