The IUPAC name for the complex [Co(NO_2)(NH_3)_5]Cl_2 is : - Vidyadip

MCQ

The $IUPAC$ name for the complex $[Co(NO_2)(NH_3)_5]Cl_2$ is :

A
penta ammine nitrito$-N-$cobalt$(II)$ chloride
✓
penta ammine nitrito$-N-$cobalt$(III)$ chloride
C
nitrito$-N-$penta ammine cobalt$(III)$ chloride
D
nitrito$-N-$penta ammine cobalt$(II)$ chloride

✓

Answer

Correct option: B.

penta ammine nitrito$-N-$cobalt$(III)$ chloride

b
(a) We first name cation and then anion.

(b) If cation is complex, then we first name ligand in alphabetical order and then central atom with oxidation state remain numeral in common brackets.

$\left[\mathrm{Cr}(\mathrm{en})_{2} \mathrm{Br}_{2}\right] \mathrm{Br}-$ is named as dibromidobis (ethylenediamine) chromium(III) bromide:

Ligands are : Br (two), ethyenediammine (two).

Central ion: $\mathrm{Cr}(\mathrm{III})$ or $\mathrm{Cr}^{3+}$

Counter ion: $\mathrm{Br}^{-}$

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