Give the IUPAC name of $[Pt(NH_3)_4]$ $[PtCl_4]$ is
- Tetra ammine platinum (o) tetra chlorido platinum (IV)
- Tetra ammine palatinate (II) tetra chlorido platinum (II)
- Tetra ammine palatinate (o) tetra chlorido platinum (IV)
- Tetra ammine platinum (II) tetra chlorido palatinate (II)
The Correct Option is D
Approach Solution - 1
The given complex is \( [\text{Pt(NH}_3\text{)}_4][\text{PtCl}_4] \), which is made up of two parts:
The first part \( [\text{Pt(NH}_3\text{)}_4] \) involves a platinum (II) ion coordinated to four ammine (\( \text{NH}_3 \)) ligands. The ammine is neutral and the platinum is in the \( +2 \) oxidation state.
The second part \( [\text{PtCl}_4] \) involves a platinum ion coordinated to four chloride (\( \text{Cl}^- \)) ligands, where platinum is in the \( +4 \) oxidation state.
Thus, the correct IUPAC name involves: The first part, \( [\text{Pt(NH}_3\text{)}_4] \), is named "tetra ammine platinate (0)" since platinum is in the \( +2 \) oxidation state, making it a platinate (0) complex. - The second part, \( [\text{PtCl}_4] \), is named "tetra chlorido platinum (IV)" since platinum is in the \( +4 \) oxidation state.
Thus, the IUPAC name is "tetra ammine platinate (0) tetra chlorido platinum (IV)".
Approach Solution -2
The complex ion \( [\text{Pt(NH}_3)_4]^{2+} \) consists of platinum in the +2 oxidation state and four ammine (NH₃) ligands. The other complex ion \( [\text{PtCl}_4]^{2-} \) consists of platinum in the +4 oxidation state and four chlorido (Cl⁻) ligands. The IUPAC naming for such complexes is based on the oxidation states of the central metal atoms. For this compound: - The ammine ligand is denoted as "ammine."
The chlorido ligand is denoted as "chlorido."
The oxidation state of platinum in the first complex is +2, and in the second complex, it is +4.
Thus, the correct IUPAC name is "tetra ammine platinat (0) tetra chlorido platinum (IV)."
Hence, the correct answer is (D).
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Concepts Used:
Nomenclature of Coordination Compounds
Nomenclature of Coordination Compounds is important in Coordination Chemistry because of the need to have an unambiguous method of describing formulas and writing systematic names, particularly when dealing with isomers.
We can apply the following formulas:
- On the very first the central atom is listed.
- Ligands are then listed in alphabetical order and their placement in the list does not depend on their charge.
- Polydentate ligands are also listed alphabetically. In such a case of an abbreviated ligand, the first letter of the abbreviation is used to determine the position of the ligand in alphabetical order.
- The formula for the entire coordination entity is enclosed in square brackets whether charged or not. The formulas are enclosed in parentheses when ligands are polyatomic. Ligand abbreviations are also enclosed in parentheses.
- Within a coordination sphere, there should be no space between the ligands and the metal.
- When the formula of a charged coordination entity is to be written without that of the counter-ions, the charge is indicated outside the square brackets as a right superscript with the number before the sign. For example, [Co(CN)6]3-, [Cr(H2O)6]3+, etc.
- The charge of the anion(s) balances the charge of the cation(s).