1.

How does huckel rule jhelp to decide the aromatic character of a compound

Answer»

SOLUTION :A COMPOUNDIS saidto bearomaticif itobeysthe followingrules
(i)Themolecule mustbe cyclic
(ii)the moleculemust l be co-planar.
(iii)Completedelocalisationof `pi-` electronicin the ring
(iv)Presence of `(4n+ 2)pi`electrons in the ringn is aninteger`(n= 0,1,2)`
THISIS knownas Hucketrule

(i)It iscyclicone(ii)it isa co- planarmolecular
(ii)it hassixdelocalised`pi`electrons
`(iv)4n+ 2=6`
`4n= 4`
`rArrn=`
It obeyHucketrulewith `n=1` hencebenzeneis aromaticin nature


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