Benzene does not respond positively to the test of unsaturation because

Options

A. it exhibits resonance
B. it has hexagonal structure
C. its double bonds are present in a ring
D. all of the bonding molecular orbitals are filled

Answer

4

Explanation

Six p atomic orbitals one from each C yield six `pi` molecular orbitals-three bondingand three antibonding Benzene has a closed bonding shell of delocalized `pi` electrons. All of the bonding orbitals are filled, all of the electrons have their spins paired and there are no electrons in the antibonding orbitals. This closed bonding shell accounts for the extra stability of benzene.