First slide

IUPAC Nomenclature

Question

The correct IUPAC name of $[Cr {({NH}_{3})}_{3} {(H_{2} O)}_{3}] {Cl}_{3}$ is

Easy

A

Triammine triaqua chromate (III) chloride
B

Triammine triaqua chromium (III) chloride
C

Tetra ammine triaqua chromium (III) chloride
D

Hexa ammine aqua chromate (III) chloride

Solution

[Cr(NH₃)₃(H₂O)₃]Cl₃
A) Cation is named first
B) While naming the complex, ligands (with prorper prefixes) are named first in alphabetical order.
C) The name of metal with its oxidation state as roman number in paranthesis
D) Prefix is not required to denote counter ion (Cl^-)
Oxidation state of ‘Cr’ = + 3
NH₃ . . . ammine
H₂O . . . aqua
$∴$ IUPAC name is triammine triaqua chromium (III) chloride.

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