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Question: Answered & Verified by Expert
In which of the following coordination compounds do the transition metals have an oxidation number of +6?
ChemistryCoordination CompoundsNEET
Options:
  • A [Cr(H2O)4Cl2]Cl.2H2O
  • B [Fe(CO)5]
  • C [(H2O)5Cr-O-Cr(H2O)5]4+
  • D K2[Cr(CN)2O2(O2)NH3]
Solution:
1215 Upvotes Verified Answer
The correct answer is: K2[Cr(CN)2O2(O2)NH3]
K2+2[Crx(CN)2-2O2-4(O2)-2NH30]
In this complex, oxide and peroxide both ligands are present
So +2 + x – 8 = 0
x = + 6.

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