Question

Does resonance occurs in pie or pie star orbital ?

Answer 1

pie orbital

Answer 2

Resonance is the delocalization of pi electrons. These electrons reside in pi (π) molecular orbitals, which are formed from the overlap of atomic p-orbitals. Pi-star (π*) orbitals are antibonding and generally unoccupied in the ground state. Thus, resonance occurs in pi orbitals.