The IUPAC name of complex [Pt(NH₃)₂Cl(NH₂CH₃)]Cl is:

Solution

Chemistry ma’am · 4 steps

List the ligands alphabetically by their names, ignore the 'di', then add platinum and its oxidation state.

1. Oxidation state. NH₃ and CH₃NH₂ are neutral and Cl⁻ is -1. One Cl⁻ sits outside as the counter ion, so the complex ion is +1 and x - 1 = +1 gives Pt as +2.
2. Name each ligand. NH₃ is ammine, Cl⁻ is chlorido, and CH₃NH₂ is methanamine, written in brackets because it is an organic ligand.
3. Alphabetical order. Order the ligands by the first letter of the ligand name and ignore the multiplying prefix: ammine, chlorido, methanamine. The prefix 'di' then goes in front of ammine.
4. So. The name is diamminechlorido(methanamine)platinum(II) chloride, which is option (a).

The idea to keep. Ligands go in alphabetical order of their own names, and prefixes like di, tri or bis do not count. A cationic complex ion is named first and the anion, such as chloride, comes last.

Answer from the NTA final answer key. Solution by PrepWiser.