Which of the following complex ions is diamagnetic? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

The compound [Zn(NH3)6]2+ has d10 configuration. Thus all the electrons are paired up and this means that it will be diamagnetic. The compound [FeF6]3– has due to d5 configuration. Thus all the electrons have same spin and this means that it will be paramagnetic. The compound [Cu(NH3)6]2+ has due to d9 configuration. Thus one of the electrons is unpaired and this means that it will be paramagnetic. The compound [Cr(H2O)6]2+ has due to d4 configuration. Thus four electrons are unpaired and this means that it will be paramagnetic.