i have taught group theory for chemists but a long time ago and at a level that is very different from what you are trying to do with these articles i have largely given up editing articles that have some connection to physical or theoretical chemistry as they are dominated by physicists who make the articles far to complicated without even a simple introduction for chemists these articles are essentially quite useless for chemistry students unless they are already doing a ph d in a specialist area and even then they go far further than they need and in a language that is also foreign to them i am still doing some quantum chemistry calculations and group theory is useful but it is long time since i have thought seriously about irreducible representations the bible for chemists on group theory is still chemical applications of group theory by f albert cotton even though my edition the st is now years old i agree that a steer on how irreps are used in chemistry symmetrised basis sets etc and their overall significance might be useful but i really find it hard to see how it would fit in with what is already there then i suspect that if i did spent a lot of time doing it it would be deleted on the grounds that i was oversimplifying or just plain wrong i am not really sure i can help and i am rather busy at present discussion