The diketone `CH_(3)-overset(overset(O)(||))(C)-(CH_(2))_(2)-overset(overset(O)(||))(C)-CH_(3)` on intermolecular aldol condensation gives the final product

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Answer

To solve the problem regarding the diketone undergoing intermolecular aldol condensation, we will follow these steps:

### Step 1: Identify the Structure of the Diketone
The diketone is represented as:
\[ CH_3C(=O)(CH_2)_2C(=O)CH_3 \]
This structure consists of two carbonyl (C=O) groups and a chain of two methylene (CH2) groups between them.

### Step 2: Understand the Aldol Condensation Mechanism
In aldol condensation, a base abstracts a proton from the alpha carbon (the carbon adjacent to the carbonyl group), generating an enolate ion. This enolate ion then attacks the carbonyl carbon of another molecule of diketone.

### Step 3: Form the Enolate Ion
Using a base (e.g., OH⁻), we abstract a proton from one of the CH2 groups adjacent to the carbonyl:
\[ CH_3C(=O)CH_2C(=O)CH_3 \]
This leads to the formation of the enolate ion:
\[ CH_3C(=O)C(-)H_2C(=O)CH_3 \]

### Step 4: Nucleophilic Attack
The enolate ion attacks the carbonyl carbon of another diketone molecule:
\[ CH_3C(=O)CH_2C(=O)CH_3 + CH_3C(=O)CH_2C(=O)CH_3 \]
This results in a new β-hydroxy ketone.

### Step 5: Formation of the Five-Membered Ring
The aldol product can cyclize to form a five-membered ring. The nucleophilic attack leads to the formation of a five-membered ring structure:
\[ \text{Cyclization occurs, leading to a structure like:} \]
\[ \text{Cyclic structure: } CH_3 - C - (CH_2) - C(=O) - CH_3 \]

### Step 6: Dehydration
Upon heating or treatment with a concentrated acid, dehydration occurs, leading to the elimination of water and formation of a double bond:
\[ \text{Final product: } \text{3-methylcyclopent-2-en-1-one} \]

### Step 7: Naming the Product
The final product can be named based on its structure:
- The compound is a cyclopentene with a ketone group and a methyl substituent.
- The final IUPAC name is **3-methyl-3-cyclopent-2-en-1-one**.

### Summary of the Final Product
The final product of the intermolecular aldol condensation of the diketone is:
\[ \text{3-methyl-3-cyclopent-2-en-1-one} \]

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