Q28 · CSIR-NET Chemistry, June 2019

Paper: CSIR-NET June 2019 · Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Electron Transfer Redox · Marks: 2 · Difficulty: Easy

Self-exchange electron transfer is fastest in

(a)$\left[\mathrm{Ru}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+/3+}$

(b)$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+/3+}$

(c)$\left[\mathrm{Cr}(\mathrm{OH})_{6}\right]^{2+/3+}$

(d)$\left[\mathrm{Fe}\left(\mathrm{OH}_{2}\right)_{6}\right]^{2+/3+}$

Answer

Answer: A ✓ checked by 4AB · confidence high

Explanation

[Ru(NH₃)₆]²⁺/³⁺ transfers a t₂g electron with almost no bond-length change, so self-exchange is fastest (a).

Study loop for Coordination Chemistry