Question

4. Is this molecule aromatic? Explain why or why not. For each molecule below, predict whether the molecule would be expected to show aromatic character or not. Explain your answer in each case. 5. (f 6. Is this molecule aromatic, antiaromatic, or nonaromatic? Explain.

Answer 1

answer 1) this molecule is not an aromatic compound because it dont follow huckels rule (4n+2) pie electron in this molecule no of pie electrons are 16 which is not possible according to huckels rule .

answer 2) a) it will not be an aromatic compound as according to huckels there should be 4n+2 pie electrons but there are only 12 electron which will take part in the conjugation ,both the electrons of double will not take part

b)it is not an aromatic compound as one of the carbon is sp3 hybridised , so it will not be a planar molecule .

c) it is not an aromatic compound the bridging carbon lies out of plane .

d)it is also not an aromatic compound there is no conjugation of electron due to negative charge.

e)it is an aromatic compound as it obeys huckel rule and there is full conjugation of electron tharoughout the ring

f) it is also an aromatic compound (obeying huckels rule)

g) it is not an aromatic compound , as there is a sp3 hybridised carbon which will be out plane