Question

Give the name, the stereochemistry and the magnetic behaviour of the following complexes:

(i) [Co (NH₃ )₅ Cl]Cl₂

(ii) K₂ [Ni (CN) ₄ ]​

Answer 1

(i) [Co(NH₃)₅Cll]Cl₂: Pentaamminechlorido cobalt (III) chloride

Co(III): [Ar] 3d⁶ 4s^o —d²sp³ hybridisation leads to octahedral shape.

Magnetic behaviour: Diamagnetic.

(ii) K₂[Ni(CN)₄]: Potassium tetracyano nickelate (II)

Ni(II): [Ar] 3d⁸ 4s° —dsp² hybridisation leads to square planar shape.

Magnetic behaviour: Diamagnetic.