- AStatement I is false but Statement II is true
- BBoth Statement I and Statement II are false
- CStatement I is true but Statement II is false
- DBoth Statement I and Statement II are true
View written solutionFree
Correct answer: B
-
Understand the structure of tropolone
Tropolone is a seven-membered ring containing:
- three bonds in the ring, and
- one carbonyl group .
It also exists as a resonance-stabilized system, and its aromaticity is discussed through delocalization over the ring.
-
Check Statement I: "Tropolone is an aromatic compound and has electrons."
- Tropolone is indeed considered aromatic because it has a cyclic, planar, conjugated system with effective delocalization.
- However, the key point is the number of delocalized electrons involved in aromaticity.
Count the relevant electrons:
- three bonds contribute electrons.
- the carbonyl bond is not counted as an extra independent pair making the ring an system in the simple sense stated.
Aromatic stabilization in tropolone is associated with a aromatic system, not an aromatic system.
Therefore, Statement I is false.
-
Check Statement II: " electrons of group in tropolone is involved in aromaticity."
In tropolone, the carbonyl group participates through resonance interaction with the ring. The system is conjugated, but the electrons of the carbonyl bond themselves are not counted as the aromatic sextet in the way the statement suggests.
Aromaticity is not described by saying that the carbonyl electrons directly contribute as part of an aromatic circuit. Thus this statement is also taken as false in standard exam treatment.
Therefore, Statement II is false.
-
Evaluate options
- A: Statement I false, Statement II true incorrect
- B: Both Statement I and Statement II are false correct
- C: Statement I true, Statement II false incorrect
- D: Both Statement I and Statement II are true incorrect
-
Final answer
The correct option is:
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