The species that has a spin only magnetic moment of 5.9 BM, is -

Question:

The species that has a spin only magnetic moment of $5.9 \mathrm{BM}$, is -

  1. $\mathrm{Ni}(\mathrm{CO})_{4}\left(\mathrm{~T}_{\mathrm{d}}\right)$

  2. $\left[\mathrm{MnBr}_{4}\right]^{2}-\left(\mathrm{T}_{\mathrm{d}}\right)$

  3. $\left[\mathrm{NiCl}_{4}\right]^{2}-\left(\mathrm{T}_{\mathrm{d}}\right)$

  4. $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$ (square planar)

Correct Option: , 2

Solution:

(2) $\left[\mathrm{MnBr}_{4}\right]^{2}-\left(\mathrm{T}_{\mathrm{d}}\right)$

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