Question

The IUPAC name of the following complex is \[ [Cr(NH_3)_3(H_2O)_2Cl]Cl_2 \]

• A. Triamminediaqua chlorido chromium (III) chloride
• B. Diaquatriammine chlorido chromium (III) chloride
• C. Chlorido diaquatriammine chromium (III) chloride
• D. Triammine diaqua trichlorido chromium (III)

Hint:

While naming coordination compounds, write ligand names in alphabetical order, determine the oxidation state of the metal, and finally name the counter ion outside the coordination sphere.

Answer 1

The Correct Option is A

Step 1: Find oxidation number and construct IUPAC name.
Two outer Cl⁻ give the cation a +2 charge; one inner Cl⁻ means Cr is +3. Ligands: 3 NH₃ (triammine), 2 H₂O (diaqua), 1 Cl⁻ (chlorido). Alphabetical order: ammine, aqua, chlorido. Add metal oxidation state and counter ion: Triamminediaqua chlorido chromium(III) chloride.

Step 2: Final Answer:
Triamminediaqua chlorido chromium(III) chloride (option 1).