# What is the double bond equivalence of the following compound?

What is the double bond equivalence of the given compound? The given answer is 14 (8 pi electrons and 6 rings = 14 DBE). But why isn't the lone pair on nitrogen considered?? The lone pair on nitrogen involves in resonance with the other 2 bonds making the ring as aromatic... so shouldn't we consider that lone pair also???

• If some double bonds are in resonance, that does not make more or fewer of them. It is still the same number of double bonds. Resonance is about as irrelevant as the weather in the street outside. So is the lone pair of N. – Ivan Neretin Apr 2 at 12:00
• Thank you so much – Srini Apr 2 at 13:17

As Ivan Neretin pointed out in the comments, $$\pi$$ bonds will remain same whether or not in resonance.
However, if you have trouble counting the double bond equvalent, you can directly use the formula for it given as $$\ce{DU=\dfrac{2C+2-H+N-X}{2}}$$ so here number of carbons are C=23, H=21, N=1 which also gives 14 as the answer.