Question

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Among the following, which is not the π-bonded organometallic compound

ChemistryCoordination CompoundsJEE Main

Options:

A $\left(\mathrm{CH}_3\right)_4 \mathrm{Sn}$
B $\mathrm{K}\left[\mathrm{PtCl}_3\left(\eta^2-\mathrm{C}_2 \mathrm{H}_4\right)\right]$
C $\mathrm{Fe}\left(\eta^5-\mathrm{C}_5 \mathrm{H}_5\right)_2$
D $\operatorname{Cr}\left(\eta^6-\mathrm{C}_6 \mathrm{H}_6\right)_2$