Question

IUPAC name of \( [Pt(NH_3)_2Cl(NH_2CH_3)]Cl \) is:

• A. (Amino methane) chloro (diammine) platinum (II) chloride.
• B. Chlorodiammine (methanamine) platinum (II) chloride.
• C. Diamminechloro (methanamine) platinum (II) chloride.
• D. Diamminechloro (methylamine) platinum (IV) chloride.

Hint:

IUPAC naming follows alphabetical order for ligands and oxidation states in Roman numerals.

Answer 1

The Correct Option is C

Step 1: Identify the Ligands
\( NH_3 \) (Diammine)
\( Cl^- \) (Chloro)
\( NH_2CH_3 \) (Methanamine)
Step 2: Determine the Oxidation State
\( Pt \) is in the \( +2 \) oxidation state.
Step 3: Naming the Complex
Ligands are named alphabetically.
The correct name is Diamminechloro (methanamine) platinum (II) chloride.

Answer 2

The IUPAC name of the complex \( [Pt(NH_3)_2Cl(NH_2CH_3)]Cl \) is Diamminechloro(methanamine)platinum(II) chloride.

Explanation:
- The complex contains two ammine (NH₃) ligands, one chloro (Cl) ligand, and one methanamine (NH₂CH₃) ligand coordinated to platinum.
- According to IUPAC nomenclature, the ligands are named first in alphabetical order: ammine, chloro, and methanamine.
- The central metal is platinum with oxidation state II, indicated as platinum(II).
- The chloride outside the coordination sphere is named as chloride.

Thus, combining these, the full name becomes Diamminechloro(methanamine)platinum(II) chloride.