Question

Which of the following name formula combinations is not correct?

• A. $K\left[Cr\right(N{H}_3{)}_{2}C{l}_4]$ - Potassium diamminetetrachlorochromate(III)
• B. $\left[Co\right(N{H}_3{)}_4\left(H_{2}O\right)I]S{O}_4$ - Tetraammineaquaiodocobalt(III) sulphate
• C. $K_2\left[Pt\right(CN{)}_4]$ - Potassium tetracyanoplatinate(II)
• D. $\left[Mn\right(CN{)}_5{]}^{2-}$ - Pentacyanomanganate (II) ion

Answer 1

Answer: (D)

$\left[Mn\right(CN{)}_5{]}^{2-}$ - Pentacyanomanganate (II) ion

The IUPAC name of the compound $\left[Mn\right(CN{)}_5{]}^{2-}$ is Pentacyanomanganate(III) ion as the oxidation number of manganese is +3.