Organic Chemistry Some Basic Principles and Techniques - Result Question 24

####28. An organic compound X (molecular formula C6H7O2N ) has six carbon atoms in a ring system, two double bonds and a nitro group as substituent, X is

[1990]

(a) Homocyclic but not aromatic

(b) Aromatic but not homocyclic

(c) Homocyclic and aromatic

(d) Heterocyclic and aromatic

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Solution:

  1. (a)

Hence it is homocyclic (as the ring system is made of one type of atoms, i.e. carbon) but not aromatic. As it does not follow (4n+2)π electron rule of aromaticity.



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