26. Label the following orbitals as bonding or antibonding, σ, π, or δ.

a)

b)

c)

d)

Answer

a) δ: 0 nodes perpendicular to the internuclear axis, which implies a bonding orbital; 2 nodes parallel to the internuclear axis, which implies a δ orbital.

b) σ: 0 nodes perpendicular to the internuclear axis, which implies a bonding orbital; 0 nodes parallel to the internuclear axis, which implies a σ orbital.

c) π*: 1 node perpendicular to the internuclear axis, which implies an antibonding orbital; 1 node parallel to the internuclear axis, which implies a π orbital.

d) σ*: 1 node perpendicular to the internuclear axis, which implies an antibonding orbital; 0 nodes parallel to the internuclear axis, which implies a σ orbital.