Question

Select the correct IUPAC name for $N{a}_2\left[Fe\right(CN{)}_{5}NO]$ complex.

• A. Sodiumpentacyanidonitrosoniumferrate(II)
• B. Sodiumpentacyanidonitrosyliumferrate(II)
• C. Sodiumpentacyanidonitrosyl ferrate(II)
• D. Sodiumpentacyanidonitrosyliron(II)

Answer 1

Answer: (A), (B)

The correct options are
A Sodiumpentacyanidonitrosoniumferrate(II)
B Sodiumpentacyanidonitrosyliumferrate(II)

The correct IUPAC name for $N{a}_2\left[Fe\right(CN{)}_{5}NO]$ complex is either (A) sodiumpentacyanidonitrosoniumferrate(II) or (B) sodiumpentacyanidonitrosyliumferrate(II)
$NO$ in +1 state it is proved by magnetic moment. Name of $N{O}^{+}$ = nitrosonium or nitrosylium.
The oxidation state of iron is written in Roman numerals in parenthesis. $-CN$ ligand is written as cyanido.
The name of the cation is written first followed by the name of the complex anion.