Question

What is the systematic name of this cooordinated compound K2[cu(cn)4] ?

Answer 1

potassium tetracyano cuprate(11)

Answer 2

IUPAC name of  $K_2[Cu(CN)_4$ is potassium tetracyano cuptrate (II)

Explanation:

Rules for naming of the coordination compounds :

a) The ligands are named first then metal.

b) The charge of metal indicated with the Roman numerals and enclosed in the parenthesis after metal name.

c) The ligands are named in alphabetical order before the metal ion.

d) Ligands that include a numerical prefix in the name use the prefixes bis for 2, tris for 3, or tetrakis for 4 to indicate their number.

e) If the complex ion is an anion, we drop the ending of the metal name and add –ate.

In the given coordination compound,Cu is the copper metal,  CN are the ligands named as cyano.

The charge on coordination sphere is -2. Cyano is having an oxidation state of -1 .

x+4(-1)=-2

x=+2

Hence, the IUPAC name of  $K_2[Cu(CN)_4$ is potassium tetracyano cuptrate (II)

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