4AB › Chemistry PYQ › CSIR-NET › December 2014 › Q71Q71 · CSIR-NET Chemistry, December 2014 Paper: CSIR-NET December 2014 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Oxidative Addition Reductive Elimination · Marks: 2 · Difficulty: Easy
The compound that undergoes oxidative addition reaction in presence of $\mathrm{H}_{2}$, is
(a) $\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]^{-}$
(b) $\left[\left(\eta^{5}-\mathrm{C}_{5} \mathrm{H}_{5}\right) \mathrm{M}(\mathrm{CO})_{3}\right]^{-}$
(c) $\left[\operatorname{IrCl}(\mathrm{CO})\left(\mathrm{PPh}_{3}\right)_{2}\right]$
(d) $\left[\left(\eta^{5}-\mathrm{C}_{5} \mathrm{H}_{5}\right)_{2} \mathrm{ReH}\right]$
Answer Answer: C ✓ checked by 4AB · confidence high
Explanation Vaska's complex, trans-[IrCl(CO)(PPh₃)₂] (d⁸, 16 e), adds H₂ oxidatively to give the Ir(III) dihydride; the anionic 18-electron species and the rhenium hydride do not.
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