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Question: Answered & Verified by Expert
In which of the following coordination compounds, the central metal ion is in zero oxidation state?
ChemistryCoordination CompoundsAP EAMCETAP EAMCET 2015
Options:
  • A $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$
  • B $\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
  • C $\mathrm{Fe}(\mathrm{CO})_5$
  • D $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$
Solution:
1026 Upvotes Verified Answer
The correct answer is: $\mathrm{Fe}(\mathrm{CO})_5$
Let oxidation state of $\mathrm{Fe}=x$
For $\mathrm{Fe}(\mathrm{CO})_5, x+(5 \times 0)=0$
$\Rightarrow \quad x=0$

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