What is the correct IUPAC name of sodium nitroprusside?

What is the correct IUPAC name of sodium nitroprusside?

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Back bonding in coordination complex 1 answer

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? Please explain.

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