There is a question in my chemistry book:
Find oxidation state of platinum ion in the complex $\ce{[Pt(O2)(en)2Br]+}$.
My books says that there is peroxide, but I want to ask why it is peroxide? Can it be superoxide?
My answer was that oxidation state of platinum is $+3$, but the answer in the book given is $+4$ with explanation that $\ce{O2}$ here is peroxide. How can I get to know from the formula that $\ce{O2}$ is peroxide and not superoxide?