Question

I have checked wikipedia it says the IUPAC name is Sodium pentacyanonitrosylferrate(II). But according to me its Sodium pentacyanonitrosylferrate(III).

Na2[Fe(CN)5NO]

Oxidation number calculation

-2= x + (-5) + 0 => x= 5-2= 3

So the oxidation number of Fe should be 3.

Shouldn't the oxidation number be 3? What is the correct IUPAC name?

Answer 1

Answer on question #60776 – Chemistry – Physical Chemistry

Question:

I have checked wikipedia it says the IUPAC name is Sodium pentacyanonitrosylferrate(II). But according to me its Sodium pentacyanonitrosylferrate(III).

Na2[Fe(CN)5NO]

Shouldn't the oxidation number be 3? What is the correct IUPAC name?

Solution:

Correct name for sodium nitroprusside – Sodium pentacyanonitrosylferrate(II)

Structure of salt:

Oxidation state of Fe is +2 because the oxidation state of NO is not 0 but +1.

$\mathrm{NO^{+}}$ – The nitrosonium ion (see https://en.wikipedia.org/wiki/Nitrosonium)

This is not classical ion.

So:

$$-2 = 5*(-1)+1+2$$

Answer: Sodium pentacyanonitrosylferrate(II)