Question

explain the differnce b/w bonding and anti-bonding molecular orbitals?

Answer 1

Bonding orbitals place most of the electron density between the nuclei of the bonded atoms.

Antibonding orbitals place most of the electron density outside the nuclei.

Answer 2

BMO:-

Here wave function are added.

Electron density is more

attraction is present

Constructive interference

Doesn't have nodal plane

Energy of BMO is less

Electron placed in a BMO stabilise a molecule.

ABMO:-

Wave function is subtracted

Electron density is less

repulsion is present

Destructive interference

Have nodal plane between nuclei of bonded atom

Energy is high

Destabilizes the molecule