1,3-Butadiene has how many bonding $\pi$ molecular orbitals?
A)1
B)2
C)3
D)4
E)0

Question

1,3-Butadiene has how many bonding $\pi$  molecular orbitals?
A)1
B)2
C)3
D)4
E)0

Quizplus · Accepted Answer

1,3-Butadiene has four carbon atoms, and therefore four atomic orbitals (2s and 2p) that will mix to form four molecular orbitals. Two of these will be bonding and two will be antibonding. The bonding orbitals include one sigma (σ) and one pi (π) bonding orbital. The pi bonding orbital is formed from the overlap of the unhybridized p orbitals on the two adjacent carbons, and therefore involves the pi electrons in the molecule. Therefore, there is one π bonding orbital present in 1,3-butadiene.

1,3-Butadiene Has How Many Bonding π\piπ Molecular Orbitals? A)1 B)2 C)3 D)4 E)0

1,3-Butadiene Has How Many Bonding $\pi$ Molecular Orbitals?
A)1
B)2
C)3
D)4
E)0