4AB › Chemistry PYQ › CSIR-NET › June 2015 › Q60Q60 · CSIR-NET Chemistry, June 2015 Paper: CSIR-NET June 2015 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: 18 Electron Rule · Marks: 2 · Difficulty: Medium
The refluxing of $\mathrm{RhCl}_{3} .3 \mathrm{H}_{2} \mathrm{O}$ with an excess of $\mathrm{PPh}_{3}$, in ethanol gives a complex A. Complex A and the valence electron count on rhodium are, respectively.
(a) $\left[\mathrm{RhCl}\left(\mathrm{PPh}_{3}\right)_{3}\right], 16$
(b) $\left[\mathrm{RhCl}\left(\mathrm{PPh}_{3}\right)_{5}\right], 16$
(c) $\left[\mathrm{RhCl}\left(\mathrm{PPh}_{3}\right)_{3}\right], 18$
(d) $\left[\mathrm{RhCl}\left(\mathrm{PPh}_{3}\right)_{5}\right], 18$
Answer Answer: A ✓ checked by 4AB · confidence high
Explanation RhCl₃ + excess PPh₃ in EtOH → RhCl(PPh₃)₃, a 16-electron Rh(I) complex (a).
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