Question

The IUPAC name of the complex $[Pt(NH_3)_2Cl(NH_2CH_3)]Cl$ is :

• A. Diammine(methanamine)chlorido platinum(II)chloride
• B. Diamminechlorido(methanamine) platinum(II)chloride
• C. Diamminechlorido(aminomethane) platinum(II)chloride
• D. Bisammine(methanamine)chlorido platinum(II)chlorid e

Answer 1

The Correct Option is B

The question requires determining the correct IUPAC name for the complex compound $[Pt(NH_3)_2Cl(NH_2CH_3)]Cl$. Let's analyze the naming process step-by-step:

1. Identify the Ligands and Their Order:
   • $NH_3$ is named "ammine".
   • $NH_2CH_3$ is named "methanamine".
   • $Cl$ inside the coordination sphere is named "chlorido".
2. Determine the Central Metal and Its Oxidation State:
   • The central metal is Pt (Platinum).
   • To calculate the oxidation state of Pt:
     • NH_3 is neutral.
     • NH_2CH_3 is neutral.
     • Cl^– contributes -1 charge.
     • Overall, the complex [Pt(NH_3)_2Cl(NH_2CH_3)]Cl is neutral.
     • Outermost Cl^– implies an overall -1 charge from the rest of the complex.
     • Hence, the oxidation state of Pt is +2.
3. Write the IUPAC Name:
   • The ligands should be named in alphabetical order: ammine, chlorido, and methanamine.
   • Thus, the name is "Diamminechlorido(methanamine) platinum(II)chloride".

Conclusion: The correct IUPAC name for $[Pt(NH_3)_2Cl(NH_2CH_3)]Cl$ is Diamminechlorido(methanamine) platinum(II)chloride.