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Which of the following is not an aromati...

Which of the following is not an aromatic species ?

A

Tropylium cation

B

Cyclooctatetraene

C

Cyclopentadienyl anion

D

Benzene

Text Solution

Verified by Experts

The correct Answer is:
B
It is a `8pi(4xx2=8pi)` electrons system i.e., `4npi` -system. Hence it is non-aromatic system.
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DINESH PUBLICATION-ORGANIC COMPOUNDS WITH FUNCTIONAL GROUP CONTAINING HALOGENS -BRAIN TEASERS - 9
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  2. The IUPAC name of citric acid is

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  3. Which of the following is not an aromatic species ?

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  4. Vinyl acetylene +HCl rarr X. Here, X is :

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  5. Which is the possible number of stereo isomers for the following formu...

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  6. Which of the following method is employed to distinguish optical isome...

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  7. The order of reactivity of AlCl(3), BF(3), SbCl(5), FeCl(3) in Friedal...

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  8. The pi electron cloud in napthalene contains

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  9. The energy difference between the chair and the boat conformations of ...

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  10. What type of isomerism is shown by benzaldoxime ?

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  11. The strongest acid amongst the following is

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  12. Lactic acid loses optical activity when reduced with red P and HI beca...

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  13. The various compounds corresponding to molecular formula C(5)H(10) are

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  14. The type of isomerism observed in urea and NH(2)-CH=NOH

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  15. Optically active isomers but not mirror images are callled

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  16. A compound having n independent asymmetric centres will have

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  17. The energy of C-=C triple bond in acetylene in kJ mol^(-) is

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  18. The IUPAC name of C(6)H(5)-C-=N is

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  19. Ethylene is obtained on electrolysing aqueous solution of :

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  20. Bacterial decomposition of wood gives :

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