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Nomenclature of Coordination Compounds

The IUPAC nam...

Question

The IUPAC name of ${[C r {(C N)}_{6}]}_{6}^{3 -}$ is __________ .

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Solution

$[C r (C N)_{6}]^{3 -}$

Oxidation state of $C r$ is $x + 6 (- 1) = - 3$

$x - 6 = - 3$

$x = + 3$

IUPAC Name: Hexacyanochromate(III)

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Q. Which of the following compounds have been named correctly according to IUPAC rules:
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[C r (N H_{3})_{5} C O_{3}] C l

- Pentamminecarbonatochromium (III) chloride
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K_{3} [C r (C N)_{6}]

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[C o (N H_{3})_{6}] C l_{3}

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