What is the actual oxidation number of the central bromine atom in the structure of tribromooctaoxid — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Tribromooctaoxide consists of a chain of three Bromine atoms. The structure is $O_3Br-BrO_2-BrO_3$. The two terminal bromine atoms form six bonds with oxygen (three double bonds each) leading to an O.S. of +6. The central bromine forms four bonds with oxygen (two double bonds) leading to an O.S. of +4.