1. The problem statement, all variables and given/known data I am trying to explain why an anion C6O6 2- would have the symmetry D6h. The problem gives you all of the IR and Raman absorptions and asks to explain why D6h is the proper symmetry for C6O6 2- anion. For you reference the problem is 3.25 in "Inorganic Chemistry" written by Huhney(sorry if i spelled your name wrong) 2. Relevant equations 3. The attempt at a solution Do you use character tables to figure this out? Or do I really have to go through the whole process of finding the irreducible set from the reducible set?