Question

Consider the following molecule (X).

The Structure X is?

• A.
• B.
• C.
• D.

Hint:

In reactions involving carbocation formation, the stability of the carbocation determines the major product. Tertiary carbocations are more stable than secondary and primary ones.

Answer 1

The Correct Option is B

The given molecule (X) visually appears to have a bicyclic structure with two fused rings. It consists of one five-membered ring fused with a six-membered ring. Let's analyze the structure and find the correct identification.

Step-by-Step Solution:

1. Observe that the structure is a fused bicyclic ring system where one ring is five-membered and the other is six-membered.
2. This particular arrangement is characteristic of indene, a hydrocarbon which is commonly seen in organic chemistry.
3. Indene consists of a benzene ring fused to a cyclopentene ring.
4. Comparing the structure of (X) with the options provided, we identify that the second option matches the characteristics of indene.

Hence, the structure (X) is Indene.

The correct answer is option 2, which correctly represents the structure of indene.

This identification relies on recognizing the common fused ring systems and their structural characteristics in organic chemistry.

Answer 2

To identify the structure of molecule (X), we need to analyze its structural features. The molecule consists of two fused rings: a five-membered ring and a six-membered ring. This characteristic is typical of bicyclic aromatic compounds.

Given the structure, the molecule resembles naphthalene, but with an additional methylene bridge connecting the two rings. This specific arrangement indicates that the molecule is an example of Indene.

Let's examine the options provided:

• Option 1: The structure resembles indene, which matches our analysis of molecule (X).
• Option 2: The structure is different due to the arrangement and the number of rings.
• Option 3: This option does not match the features of (X) as it lacks a six-membered ring.
• Option 4: This does not resemble the structure of (X) due to its different aromatic characteristics.

The correct answer is the structure that matches the indene configuration:

Conclusion: Hence, the structure of molecule (X) is indene. The correct option is the one which accurately represents the indene structure, consistent with the analysis conducted.