Answer to Question #149708 in Organic Chemistry for crishna

Question

Find the correct statement about benzene. *
Benzene has six p-orbitals and six pi-electrons delocalised across all the carbon atoms in the six-membered ring.
Benzene is electron-rich and is, therefore, reactive towards electrophiles.
Benzene does not react like an alkene because there are not really double bonds in the structure.
In the resonance structures of benzene, the positions of the pi-electrons differ but the positions of the atoms remain the same.

Answer 1

The correct answers are A, B and D.

A is correct because In benzene there are 6 p-orbitals and 3 pi bonds. We can verify the total number of pi electrons in benzene by counting the pi bonds: 3 pi bonds times two electrons = 6 pi electrons total.

B is correct because benzene is a nucleophile as it's electron rich and as such reacts with electrophiles.

C is wrong because even though benzene does not react (does not undergo addition reaction) like an alkene, it has real double bonds

D is right because only electrons move and the nuclei of the atoms never move.