Click on images to see larger view.
2.65 Å
2.43 Å
2.33 Å
2.22 Å
2.12 Å
2.01 Å
1.96 Å
1.91 Å
1.85 Å
1.80 Å
1.75 Å
1.69 Å
Re = 1.67 Å

HAl is in the singlet sigma plus state

Click here to see small animation
Click here to see big animation

Note: In the animations the potential curves are neither accurate nor to scale.
They mearly provide a guide for the relative energies of the images.