Question

What is the IUPAC name of [Pt(NH₃)₂Cl(NO₂)]?

• A. Diamminechloridonitrito-N-platinum(II)
• B. Diamminechloridenitrito-N-platinum(III)
• C. Diamminechloridonitrito-O-platinum(II)
• D. Diammonia chloridonitrito-N-platinum(II)

Answer 1

The Correct Option is A

[Pt(NH₃)₂Cl(NO₂)] is the coordination compound.

• NH₃ is the ammine ligand, Cl is the chlorido ligand, and NO₂ is the nitrito ligand, which is bound through the nitrogen (N), not oxygen (O).
• Platinum (Pt) has an oxidation state of +2.
• The name follows the order of ligands: Ammine (NH₃), Chlorido (Cl), and Nitrito-N (NO₂ bound through nitrogen).

Thus, the correct IUPAC name is Diamminechloridonitrito-N-platinum(II).

Answer 2

In the coordination compound [Pt(NH₃)₂Cl(NO₂)], the ligands are named in alphabetical order: "diammine" (for the two NH₃ groups), followed by "chlorido" (for Cl⁻) and "nitrito-N" (for NO₂ attached via nitrogen). The oxidation state of platinum here is +2, denoted as "(II)" in the name. Therefore, the IUPAC name is "Diamminechloridonitrito-N-platinum(II)".