The ion [Co(NH₃)₆]²⁺ is octahedral and high spin. This complex is A) paramagnetic, with 1 unpaired electron. B) paramagnetic, with 3 unpaired electrons. C) paramagnetic, with 4 unpaired electrons. D) paramagnetic, with 5 unpaired electrons. E) diamagnetic.

Question

Quizplus · Accepted Answer

In a high-spin octahedral complex of Co^2+ (d^7 configuration), there are 3 unpaired electrons due to the higher energy required to pair electrons in the eg orbitals compared to the energy difference between the t2g and eg orbitals.

The Ion [Co(NH3)6]2+ Is Octahedral and High Spin

The Ion [Co(NH₃)₆]²⁺ Is Octahedral and High Spin