ATOMIC ORBITALS, BONDS AND DISPERSION FORCES When you combine 2 orbitals, you mu

Question

ATOMIC ORBITALS, BONDS AND DISPERSION FORCES

When you combine 2 orbitals, you must get 2 orbitals out. In this case, the two resulting orbitals are the one from case 1 (waves from the hydrogen orbitals have the same sign) and that for case 2 (different sign), shown diagrammatically below:

[A] Given that the energy level decreases when the size of a finite well increases, what can you say why the energies for the two combination orbitals (? orbitals) are in the order shown here?

[B] What does this suggest will happen to a swarm of molecules with their orbitals behaving as in:

[C] What happens to the interactions between molecules when the time behavior becomes nearly synchronized?

Explanation / Answer

[A] The energy of the orbitals whenevr they combine remains always same, but whenever they form bonding and antibonding orbitals there energy vary because as per molecular orbital theory, the electrons which are in bonding orbitals in a bond are between two nuclei. While the one in antibonding are outside of two nuclei region. So the electrons in bonding are more stable being bounded by two nuclei and thus have lower energy whereas antibonding has higher enegy and unstable.

[B] It will come out to be zero which represents a node.

[C] When time behaviour becomes same then there will be least interactions will be same and bonding and antibonding cant be distingushed.

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