Question

IUPAC name of $N{a}_3\left[Co\right(N{O}_2{)}_6]$ is

• A. sodium cobaltinitrite
• B. sodium hexanitritocobaltate (III)
• C. trisodium hexanitritoocobalt (III)
• D. sodium hexanitritocobaltate (II)

Answer 1

The correct option is B sodium hexanitritocobaltate (III)

Cobalt exists in +3 oxidation state, and the complex is negatively charged, so the metal name should end in -ate.

The answer is sodium hexanitritocobaltate (III)