Question

Why don't wavefunctions for electrons in neighbouring molecules overlap?

Answer 1

You have one 1s atomic orbital for each H atom, and one 1s, 2s and three 2p for each C. This makes a total of 36 atomic orbital in the whole molecule, and so you have 72 spin states.

The 2s and 2p's orbitals are going to hibridate giving three 2sp22 orbitals and one 2p orbital, so it has its characteristic ππ-delocalized electronic estructure on the ring.

Answer 2

The 2s and 2p's orbitals are going to hibridate giving three 2sp22 orbitals and one 2p orbital, so it has its characteristic ππ-delocalized electronic estructure on the ring.