Manipal MET2022ChemistryCoordination Compounds
Select the correct statement.
Options
- A[ Ni ( CN )₄ ]²⁻ is diamagnetic whereas [ Ni ( CO )₄ ] is paramagnetic.
- B[ Ni ( CN )₄ ]²⁻ and [ Ni ( CO )₄ ] both are diamagnetic.
- C[ Ni ( CN )₄ ]²⁻ is s p^3 hybridised and square planar in shape whereas [ Ni ( CO )₄ ] is d s p^2 hybridised a
- D[ Ni ( CN )₄ ]²⁻ is paramagnetic and d s p^2 hybridised whereas [ Ni ( CO )₄ ] is diamagnetic and s p^3 hybrid
Correct answer
B. [ Ni ( CN )₄ ]²⁻ and [ Ni ( CO )₄ ] both are diamagnetic.
Step-by-step solution
Both [ Ni ( CN )₄ ]²⁻ and [ Ni ( CO )₄ ] are diamagnetic. [ Ni ( CN )₄ ]²⁻ Electronic configuration of Ni ²⁺=[ Ar ] 3 d^8 . CN ⁻ being strong field ligand cause pairing of electrons. There are no unpaired electrons. Therefore, it is diamagnetic. Shape : square planar [ Ni ( CO )₄ ] Electronic configuration of Ni =[ Ar ] 3 d^8 4 s^2 CO being strong field ligand cause pairing of electrons. No unpaired electrons are there. Therefore, it is diamagnetic in nature. Shape : Tetrahedral.