Whichof the following compoundsis not aromatic ?

1.	Whichof the following compoundsis not aromatic ?
Answer» Solution :(a) has a CYCLIC cloud of `2 pi`-ELECTRONS and HENCE is AROMATIC. (b) and (d) have a cyclic cloud of six `pi`-electrons and hence are aromatic while (c ) has 4 `pi`-electrons and hence is antiaromatic.

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