O2 is paramagnetic while n2 is diamagnetic
Answers
Explanation:
We can explain this by Molecular Orbital Theory.
in the electronic configuration of N2 it has all paired electrons which makes it diamagnetic while O2 has unpaired electrons which makes it paramagnetic...
O2 is paramagnetic while n2 is diamagnetic
Explanation:
Molecular Orbital Theory
It was developed by F.Hund and R.S Mullikan in 1932.
The features of this theory are:
• The electrons in a molecule are present in various molecular orbital as the electrons of atom are present in different various shells.
• The atomic orbitals of comparable energies and proper symmetry combine to form molecular orbitals.
• In molecular orbital electrons are in influence of two or more nuclei.
• The two orbitals formed due to combination are: Bonding and Anti -bonding.
• The Bonding molecular orbital has lower energy and greater stability than Anti -bonding.
• The electron probability distribution around group of nuclei is given by molecular orbital.
• The molecular orbitals are filled in accordance to Aufbau principle, Pauli’s principle and Hund’s rule.
The linear combination of atomic orbitals to form molecular orbital takes place only if:
• The combining orbitals must have same energy.
• The combining orbitals must have same symmetry.
• The combining orbitals must overlap to maximum extent.
The order to fill molecular orbital is:
б1s,б°1s,б2s,б°2s,π2px=π2py,б2pz,π°2px=π°2py,б°2pz
In case of : O2
The number of electrons are = 8 x2 =16
They are filled as :
б1s²,б°1s²,б2s²,б°2s²,π2px²=π2py²,б2pz²,π°2px¹=π°2py¹
In oxygen : Bond order = Antibonding -bonding /2
B.O=10-6/2=4/2=+2
In nitrogen molecule : 7 x 2=14
б1s²,б°1s²,б2s²,б°2s²,б2pz²,π2px²=π2py²
B.o= 10-4/2=3
Magnetic character :
If unpaired electrons = paramagnetic
If paired electrons = Diamagnetic
In oxygen : there are unpaired electrons therefore : Para-magnetic and in nitrogen , there is no unpaired electron therefore , it is dia-magnetic .