The IUPAC name of the complex \([Pt(NH_3)_2Cl(NH_2CH_3)]Cl\) is:
Answer & explanation
Correct answer: option 3
The correct answer is option 3. Diamminechloridomethylamineplatinum(II) chloride.
The complex \([Pt(NH_3)_2Cl(NH_2CH_3)]Cl\) consists of:
\(Pt\) (platinum) as the central metal ion.
\(NH_3\) (ammonia) as a neutral ligand.
\(Cl\) (chloride) as a ligand.
\(NH_2CH_3\) (methylamine) as another neutral ligand.
\(Cl\) (chloride) outside the coordination sphere.
Step-by-step IUPAC Naming:
Naming the ligands:
The ligand \(NH_3\) (ammonia) is named ammine.
The ligand \(Cl\) (chloride attached to platinum) is named chlorido.
The ligand \(NH_2CH_3\) (methylamine) is named methylamine.
Order of ligands: In IUPAC nomenclature, ligands are named in alphabetical order, so "ammine" comes before "chlorido" and "methylamine."
Oxidation state of platinum:
The overall charge of the complex ion is neutral because the coordination sphere is \([Pt(NH_3)_2Cl(NH_2CH_3)]^+\) and there is one chloride ion \((Cl^-)\) outside the coordination sphere.
Platinum is in the +2 oxidation state, which is denoted as (II).
Chloride outside the complex: The chloride ion outside the coordination sphere is written as "chloride" at the end.
The IUPAC name of the complex \([Pt(NH_3)_2Cl(NH_2CH_3)]Cl\) is Diamminechloridomethylamineplatinum(II) chloride.