The reaction of Pt (NH₃)₄²⁻ with two equivalents of NH₃ produces · ABC26IN1021

Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Reaction Mechanisms Substitution · Exam: CSIR NET JUNE 2013 · Marks: 2 · Difficulty: Easy

The reaction of $\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{4}^{2-}$ with two equivalents of $\mathrm{NH}_{3}$ produces
(a)cis- $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]$
(b)trans $-\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]$
(c)both cis- $\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]$ and trans $-\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]$
(d)cis $-\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{4}\right]^{2-}$
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
The trans effect of Cl⁻ > NH₃ directs the second NH₃ cis to the first: cis-[Pt(NH₃)₂Cl₂] (cisplatin).

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