Question
Chemistry Question on d -and f -Block Elements
Nickel combines with a uninegative monodentate ligand (X-) to form a paramagnetic complex [NiX4]2-.The hybridization involved and number of unpaired electrons present in the complex and respectively
A
sp3,two
B
dsp2, zero
C
dsp2,one
D
sp3,one
Answer
sp3,two
Explanation
Solution
The correct answer is option (A): sp3,two
Monodentate ligand is uninegative and hence, the oxidation number of Ni in [NiX4]2− is +2.
The electronic configuration of Ni2+ is [Ar]3d8.
If the compound is diamagnetic it means all the electrons are paired. Hence, there will be one 3d orbital empty and one 4s orbital empty.
