Q87 / 200 · NEET 2003 · Chemistry

According to IUPAC nomenclature sodium nitroprusside is named as:

  • A
    sodium nitroferricyanide
  • B
    sodium nitroferrocyanide
  • Correct answer
    C
    sodium pentacyanonitrosyl ferrate (II)
  • D
    sodium pentacyanonitrosyl ferrate (III)

Solution

Sodium nitroprusside $$ \mathrm{Na}_2\left[\mathrm{Fe}\left(\mathrm{CN}_5\right) \mathrm{NO}\right] $$ Let oxidation state of $\mathrm{Fe}$ is $x$ in this compound. $$ \begin{aligned} & +2+x+(-1) 5+1=0 \\ & \text { or }+2+x-5+1=0 \text { or } x=+2 \end{aligned} $$ Thus IUPAC name of sodium nitroprusside is sodium pentacyanonitrosyl ferrate (II)

Hence, the correct answer is option: 'C'.

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