JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds ?
A. \([\text{NiCl}_4]^{2-}\) \(-\) sp\(^3\), tetrahedral, paramagnetic
B. \([\text{Ni(NH}_3)_6]^{2+}\) \(-\) sp\(^3\)d\(^2\), octahedral, paramagnetic
C. \([\text{Ni(CO)}_4]\) \(-\) sp\(^3\), tetrahedral, paramagnetic
D. \([\text{Ni(CN)}_4]^{2-}\) \(-\) dsp\(^2\), square planar, diamagnetic
Choose the correct answer from the options given below :
- A A, B, C and D
- B B, C and D only
- C A, C and D only
- D A, B and D only
Answer & Solution
Correct Answer
(D) A, B and D only
Step-by-step Solution
Detailed explanation
In \([\text{NiCl}_4]^{2-}\), Ni is in \(+2\) oxidation state with a \(3d^8\) configuration. Since \(\text{Cl}^-\) is a weak field ligand, no pairing of electrons takes place. The hybridisation is \(sp^3\), the geometry is tetrahedral, and the presence of two unpaired electrons…
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