Exam

JEE Advanced

Year

2008

Paper

Paper 2

Subject

Chemistry

Chapter

Coordination Compounds

JEE Advanced 2008 · Paper 2 · Chemistry · Coordination Compounds

Both [Ni(CO)_4] and [Ni(CN)_4]^ 2- are diamagnetic. The...

Both $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ are diamagnetic. The hybridisations of nickel in these complexes, respectively, are

Step-by-step solution

In $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$, the oxidation state of $\mathrm{Ni}$ is zero $(0)$. $\mathrm{Ni}($28)[$\mathrm{Ar}]$4 \mathrm{~s}^2, 3 d⁸ $<img src="/api/proxy-image?url=https$ \\ $\mathrm{CO} \text{ is a strong ligand, causes coupling, thus }<img src="/api/proxy-image?url=https$ \\ In $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$, the oxidation state of $\mathrm{Ni}$ is $+2\mathrm{Ni}^{2+}=[\mathrm{Ar}] 3 d^8, 4 s^0<img src="/api/proxy-image?url=https$ \\ $\mathrm{CN}^{-} \text{is strong ligand causes coupling. }$