Question
Chemistry Question on coordination compounds
Which statement is incorrect
A
Ni(CO)4 – Tetrahedral, paramagnetic
B
Ni(CN)-24 - Square planar, diamagnetic
C
Ni(CO)4 - Tetrahedral, diamagnetic
D
[Ni(Cl)4]-2 – Tetrahedral, paramagnetic
Answer
Ni(CO)4 – Tetrahedral, paramagnetic
Explanation
Solution
The correct option is(A): Ni(CO)4 – Tetrahedral, paramagnetic.
Geometry: Ni(CO)4 is not tetrahedral. It has a square planar geometry. The nickel atom (Ni) is bonded to four carbon monoxide (CO) ligands in a flat, square arrangement.
Magnetic Properties: Ni(CO)4 is indeed paramagnetic. It has unpaired electrons in its molecular orbital diagram, making it attracted to an external magnetic field.
So, the statement that Ni(CO)4 is tetrahedral is incorrect; it has a square planar geometry.