The spin only magnetic moment value (in Bohr magneton units) of $\mathrm{Cr}(\mathrm{CO})_6$ is

The spin only magnetic moment value (in Bohr magneton units) of $\mathrm{Cr}(\mathrm{CO})_6$ is
  1. 0
  2. $2.84$
  3. $4.90$
  4. $5.92$

Solution

$\mathrm{CO}$ is a strong ligand, all the six electron of the valence shell of $\mathrm{Cr}$ is paired and spin only magnetic moment $=0$.

Asked in: JEE Advanced 2009 (Paper 2)

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