What is the correct IUPAC name for K₃[Co(NO₂)₆]? A) tripotassiumhexanitritocobalt(0) B) tripotassiumhexanitritocobalt(III) C) potassium hexanitritocobaltate(III) D) potassium hexanitritocobalt(III) E) potassium hexanitratocobalt(III)

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According to the IUPAC rules, the complex ion [Co(NO₂)₆)] should be named as nitrito-S'-(nitroso-S'')-S-ethyldithiocobaltate(III). The entire complex is then enclosed in square brackets and the number of ligands is indicated by a prefix (hexa, in this case) before the ligand name (nitritocobaltate). Finally, the charge on the complex is indicated in parentheses (III, in this case). The counterions (potassium) are named as such and the number of counterions is indicated by a prefix (tri, in this case) before the name of the counterion. Therefore, the correct name for K₃[Co(NO₂)₆] is potassium hexanitritocobaltate(III).

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What Is the Correct IUPAC Name for K₃[Co(NO₂)₆]