Question

please answer question 1

These questions relate to the lectures about M.O. Theory and Term Symbols. 1. Prepare and label a molecular orbital energy level diagram (M.O. diagram) for the hydrogen molecule, Ha. Sketch the general shapes of the MOs formed. Appropriately shade the phases on the MOs.

Answer 1

An Hydrogen atom consists of 1 electron in 1s orbital. Two 1s orbital from two Hydrogen atoms combine to give two molecular orbital.

The molecular orbital diagram is drawn as follows.

o*(15) 11 1 olas) o(1) H-atom H2 molecule H-atom

Here, 1s and 1s orbitals of H-atom combine in phase to give $\sigma(1s)$ orbital and they combine out of phase to give orbital. The formation of these orbitals and the shapes are shown in the below figure.

o*1s)

In Phase Q+o- o o(15) Out of Phase o*(15) 1.5 15

The shading implies negative wave function.