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  4. The value of 'n' for the following molecule according to Huckel's rule is

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Q. The value of 'n' for the following molecule according to Huckel's rule isChemistry Question Image

VMMC MedicalVMMC Medical 2015

Solution:

There are $ \text{16 }\!\!\pi\!\!\text{ -} $ electrons in the molecule, but this can not be aromatic by Huckel rule, so in order to be aromatic and to follow Huckel rule, only $ \text{14 }\!\!\pi\!\!\text{ -} $ electrons should be involved in making the ring.