According to molecular orbital theory, how many $\pi$-bonding molecular orbitals are there for benzene?

Question

According to molecular orbital theory, how many  $\pi$-bonding molecular orbitals are there for benzene?

Quizplus · Accepted Answer

Benzene has six carbon atoms, each of which participates in the pi-electron system. Therefore, there are six pi-electrons. According to the molecular orbital theory, for every pi-electron pair, there are three F1F1F1S1F1F1F10-bonding molecular orbitals. Thus, there are a total of 6*pi-electrons*3 orbitals per pi-electron pair = 18 orbitals. However, due to symmetry constraints, only three of these orbitals are unique. Therefore, there are three F1F1F1S1F1F1F10-bonding molecular orbitals for benzene.

According to Molecular Orbital Theory, How Many π\piπ -Bonding Molecular Orbitals Are There for Benzene? A) 1 B)

According to Molecular Orbital Theory, How Many $\pi$ -Bonding Molecular Orbitals Are There for Benzene?
A) 1
B)