The IUPAC name of the complex $[Pt(NH_3)_2Cl(NH_2CH_3)]Cl$ is :
- Diammine(methanamine)chlorido platinum(II)chloride
- Diamminechlorido(methanamine) platinum(II)chloride
- Diamminechlorido(aminomethane) platinum(II)chloride
- Bisammine(methanamine)chlorido platinum(II)chlorid e
The Correct Option is B
Approach Solution - 1
Correct answer: diamminedichloridoplatinum(II)
The compound cis-Platin has the formula: \[ \text{[Pt(NH}_3)_2\text{Cl}_2] \]
IUPAC naming rules applied:
- Neutral ligands like NH3 are named as ammine.
- Negative ligands like Cl- are named as chlorido.
- Ligands are listed in alphabetical order, regardless of charge: ammine before chlorido.
- The oxidation state of platinum here is +2, hence denoted as (II).
So, the correct name is: diamminedichloridoplatinum(II)
Approach Solution -2
Approach Solution -3
Cisplatin has the formula \([Pt(NH_3)_2Cl_2]\). The oxidation state of platinum in this complex is +2.
The IUPAC naming conventions for coordination compounds are:
- Ligands are named alphabetically.
- The oxidation state of the metal is indicated in Roman numerals in parentheses.
- The name of the complex ends with the name of the metal.
Following these rules:
- "ammine" refers to the NH3 ligand. There are two of them, so "diammine."
- "chlorido" refers to the Cl- ligand. There are two of them, so "dichlorido."
- Platinum has an oxidation state of +2, so "platinum(II)."
Therefore, the correct IUPAC name is diamminedichloridoplatinum(II).
Answer:
diammines dichlorido platinum (II)
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Concepts Used:
Isomerism in Coordination Compounds
Isomers in Coordination Compounds
Stereoisomers occur when the ligands have the same bonds, but the bonds are in different orientations relative to one another. Structural isomerism occurs when the bonds are different. Isomers are distinct compounds that can have different physical properties such as color, crystal structure, and melting point.
Cis and Trans Stereoisomers
In octahedral complexes—with four of one ligand and two of another—and square planar complexes—with two of one ligand and two of another—there are two different arrangements of the same atoms with the same bonds. These different arrangements are called cis and trans. In cis molecules, the two ligands are on the same side of the complex. In trans molecules, the similar ligands are on the opposite sides of the molecules, meaning the bond angle is 180 degrees.
Optical Stereoisomers
Optical isomerism occurs when a molecule is not superimposable with its mirror image.
Fac and Mer Stereoisomers
When three identical ligands occupy one face of an octahedron, the isomer is said to be facial or fac. If these three ligands and the metal ion are in one plane, the isomer is said to be meridional or mer.