Question

What is the shape and magnetic nature of permanganate ion ?

• A. Pyramidal diamagnetic
• B. Tetrahedral, diamagnetic
• C. Tetrahedral, paramagnetic
• D. Planar, paramagnetic

Answer 1

Answer: (B)

Tetrahedral, diamagnetic

Answer 2

The permanganate ions are tetrahedral. The $\pi$ -bonding takes place by overlap of $p$ -orbitals of oxygen with $d$ -orbitals of manganese. It is also diamagnetic due to the absence of unpaired electron. The structure of permanganate ion is given below: