The substitution of η⁵-Cp group with nitric oxide is the easiest for

Q64 · CSIR-NET Chemistry, December 2012

Paper: CSIR-NET December 2012 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallic Compounds – General · Marks: 2 · Difficulty: Easy

The substitution of $\eta^{5}-\mathrm{Cp}$ group with nitric oxide is the easiest for

(a)$\left(\eta^{5}-\mathrm{Cp}_{2}\right) \mathrm{Fe}$

(b)$\left(\eta^{5}-\mathrm{Cp}_{2}\right) \mathrm{CoCl}$

(c)$\left(\eta^{5}-\mathrm{Cp}_{2}\right) \mathrm{Ni}$

(d)$\left(\eta^{5}-\mathrm{Cp}_{2}\right) \mathrm{Co}$

Answer

Answer: C ✓ checked by 4AB · confidence high

Explanation

Nickelocene is a 20-electron complex; replacing a Cp (5 e) by NO (3 e) gives the 18-electron CpNi(NO), so substitution is easiest for Cp₂Ni.

Study loop for Organometallic Compounds