Which from following complexes contains only neutral ligands in it?

Which from following complexes contains only neutral ligands in it?
  1. Pentaammineaquacobalt(III) chloride
  2. Triamminetrithiocyanatorhodium(III)
  3. Bis(ethylenediamine) dithiocyanatoplatinum(IV)
  4. Triamminetrinitrocobalt(III)

Solution

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{H}_2 \mathrm{O}\right] \mathrm{Cl}_3$ $\mathrm{NH}_3, \mathrm{H}_2 \mathrm{O}=$ Neutral ligands $\mathrm{SCN}^{-}$, en $, \mathrm{NO}_2^{-}, \mathrm{CN}^{-}=$anionic ligands.

Asked in: MHT CET 2024 (02 May Shift 1)

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