Question

Indicate which orbitals form the overlap and indicate the bond type(s) in the following bond according to the Orbital Overlap Model. For any directional references, assume the primary framework axis is the x-axis.

a. C-C

b. N-H

Answer 1

a) C-C bond formation

C has the electronic configuration of 2s² 2p² in its ground state

In excited state, the electron configuration would be 2s² 2p³

Thus C can make 4 bonds

C can form single, double, as well as triple bond

the orbitals involved are its valence 2p orbitals

H-C50—H 000 88 8.fr Pz

Px orbitals form the sigma bond whereas Py & Pz orbitals form pi bonds and the valence s orbital overlaps with the side substituted atoms.

Thus C - C triple bond is formed.

b) N has an electronic configuration of 2s² 2p³

3 valence p orbitals are available for bonding with a lone pair of 2s electrons.

sigma bond is formed between N & H by the overlap of Px orbital of N & s orbital of H