Multiple choice

Which of the following pairs of formula and its IUPAC name is mismatched?

  1. [Rh(η5-C5H5)2] : bis(η5-cyclopentadienyl)rhodium(II)

  2. K2[OsCl5N] : potassium pentachloronitridoosmate(III)

  3. Cr(η6-C6H6)2 : bis(η6-benzene)chromium

  4. [Co(NH3)5CO3]Cl : pentaamminecarbonatocobalt(III) chloride

  5. [Cr(H2O)4Cl2]Cl : tetraaquadichlorochromium(III) chloride
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B Correct answer
Explanation

Osmium is in +6 oxidation state in given complex. Hence, the correct IUPAC name of K2[OsCl5N] is potassium pentachloronitridoosmate(VI).

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