Provide name of complex ion [Fe(CN) 5 NO] 3–

Here we need to provide the name of the complex ion that's before us, and we're gonna say here it's negatively charged, which will play a role later on. But the first thing we need to do is we need to name our ligands alphabetically. In this example, what we have here is a cyanide ion, its ligand name would become cyano, and then we have n o here, which its ligand name would be nitrosyl. Remember we have to name this alphabetically, so cyanoc, comfort for nitrosyl n. We also have to mention how many we have of them. Cyanide ion, we have 5 of them, they're all identical. So remember the numerical prefix for 5 would be penta. So this would be pentacyano. There's only 1 nitrosyl within this, so this would just be nitrosyl. And because it's negatively charged, that means here we have to change the ending of the of the iron, to 8. And we also have to use a Latin based form of its name because iron is f e. You remember iron here would be ferrate altogether. And we have to talk about what's the charge of this transition metal. Well, here, we don't know what it is, so it's x. Cyanide ion here is minus 1, and then nitrosyl is 0. So x plus the 5 cyanide ions plus 0 for the nitro cell equals minus 3, the overall charge. X minus 5 equals negative 3. Add 5 to both sides, x equals plus 2. So this is iron 2 ion that we're dealing with in terms of this complex ion, which would be ferrate 2. So this will be the name of our particular complex ion, pentacyanonitrosylferrate 2.

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24. Transition Metals and Coordination Compounds

Naming Coordination Compounds

General Chemistry

24. Transition Metals and Coordination Compounds

Naming Coordination Compounds

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Multiple Choice

Provide name of complex ion [Fe(CN)₅NO]^3–

pentacyanidenitrosylferrate(II)

pentacyanidenitroferrate(III)

pentacyanonitrosylferrate(II)

pentacyanonitroferrate(III)

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Verified step by step guidance

Identify the ligands in the complex ion. In [Fe(CN)5NO]3–, the ligands are CN (cyanide) and NO (nitrosyl).

Determine the number of each type of ligand. There are five cyanide ligands and one nitrosyl ligand.

Name the ligands in alphabetical order. 'Cyano' comes before 'nitrosyl', so the ligands are named as 'pentacyano' and 'nitrosyl'.

Identify the central metal and its oxidation state. The central metal is iron (Fe). The overall charge of the complex is -3. Calculate the oxidation state of iron by considering the charges of the ligands: CN has a charge of -1 and NO is neutral.

Combine the ligand names, central metal, and oxidation state to form the name of the complex ion. The correct name is 'pentacyanonitrosylferrate(II)' for the complex ion [Fe(CN)5NO]3–.