Question

The correct statement(s) among the following is/are:

• A.
  are identical compounds
• B.
  are structural isomers
• C.
  
  are identical compounds
• D.
  are structural isomers

Answer 1

Answer: (B), (C)

The correct options are
B
are structural isomers
C


are identical compounds
Identical compounds:
They are the compounds with all atoms in the same spatial orientation.
Since the above structure is antiaromatic and hence we can not say all the bonds are equal (due to lack in resonance). So, the orientation of all atoms are not same therefore they are not identical.
As they have same molecular formula but different structures thay are structural isomers.
The below shown molecule is aromatic and hence all the bond are equivalent due to resonance.
As orientation of all atoms is same thus they are identical.