The compound is
paramagnetic since it contains two unpaired electrons Similarly,
[Ni(CO)4] has tetrahedral geometry but is diamagnetic since nickel is in
zero oxidation state and contains no unpaired electron Rationalised 2023-24
130
Chemistry
Orbitals of Ni ion
2+
dsp hybridised
orbitals of Ni
2
2+
[Ni(CN) ]
(low spin complex)
4
2–
3d
4s
4p
Four pairs of electrons
from 4 CN groups
–
dsp
2 hydrid
3d
4p
3d
4p
5 5