Question

What is the dbe for following molecule?​

Answer 1

I think 4/8 ......

may be

Answer 2

Answer:

The DBE of given molecular is 21.

How?

there's 4 Benzene with 12 π bond inside + 4 ring therefore = 16

and,

there's 4 more rings in between benzene.

therefore 16 + 4 = 20

Now, Look carefully the whole structure make a ring itself thus adding 1 for that we get 21 as Answer.