UPSC Combined Geo-Scientist, Mains · 2026 · Mains Paper I
Q2(c). Magnetism and isomers of M(PR₃)₂Cl₂ (M = Ni, Pd)
Question
Nickel and palladium both form complexes of the general formula M(PR₃)₂Cl₂. The nickel(II) compound is paramagnetic, whereas the palladium(II) compound is diamagnetic. (i) Explain the magnetic properties of these compounds. (ii) How many isomers of each compound are expected?
Model answer
The free solution for 2026 answers the questions picked in its time plan. Question 2 is answered in full in the Book Edition of the 2026 solutions of Geo-Scientist Chemistry Paper I.
Coversgeometry and magnetismMagnetism and isomers of M(PR₃)₂Cl₂ (M = NiPd)
All parts of Question 2
- 2(a) SrCl₂ or CdCl₂: fluorite structure10 marks
- 2(b) Assignment of the spectrum of [Cr(NCS)₆]³⁻10 marks
- 2(c) Magnetism and isomers of M(PR₃)₂Cl₂ (M = Ni, Pd)10 marks