In the complex ion [Co(en)₂Br₂]⁺, the oxidation number of Co is

Question

Quizplus · Accepted Answer

In the complex ion, each of the en ligands has a neutral charge (since it is a bidentate ligand with both nitrogen atoms donating an electron pair). The overall charge of the complex ion is 1+, which means that the sum of the charges of the other ligands and the central metal ion must add up to +1. There are two bromide (Br-) ligands, each with a charge of -1, which gives us a total charge of -2 for the bromides. The remaining charge must come from the complex ion itself, which contains two bidentate bipyridine (B12S1U1B) ligands and two monodentate thioether (S1U1B0) ligands. The bipyridine ligands have a neutral charge, while the thioether ligands each have a -1 charge, for a total of -2. This means that the net charge on the central metal ion, Co, must be +3 in order for the overall charge of the complex to be +1. Therefore, the answer is C, +3.

In the Complex Ion [Co(en)2Br2]+, the Oxidation Number of Co

In the Complex Ion [Co(en)₂Br₂]⁺, the Oxidation Number of Co