CBSE Class 11-science Answered
EXPLAIN THE RULES FOR DETERMINATION OF AROMATIC CHARACTER OF ANY ORGANIC COMPOUNDS WITH ANY SUITABLE EXAMPLE
Asked by roopali mishra | 22 Feb, 2014, 09:19: PM
Expert Answer
If the compound does not meet all the following criteria, it is likely not aromatic.
- The molecule is cyclic (a ring of atoms)
- The molecule is planar (all atoms in the molecule lie in the same plane)
- The molecule is fully conjugated (p orbitals at every atom in the ring)
- The molecule has 4n+2 π electrons (n=0 or any positive integer)
Benzene
Example:
Characteristics of benzene:
(i) It is cyclic and planar.
(ii) It exhibits continuous delocalisation. All the carbons of cyclic system are sp2 hybridised and thus p orbitals are available for delocalisation.
(iii) It obeys Huckel’s rule, as the number of delocalised P electrons is six.
(iv) Thus benzene is aromatic as all the conditions are satisfied.
Answered by | 25 Feb, 2014, 11:49: AM
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