Let's imagine a molecule and put it in a 3D space. Let's also imagine an electronic transition for this molecule. I know how an electronic transition works, how to value if it is possible (using the rules derived from the symmetry of the molecule and so on). My question is: how do I understand how the electron moves during the transition WITHOUT using the symmetry of the molecule? Can I "see" in which direction the electron moves in the 3D space without using the symmetry?
(I hope I've been clear enough to understand the question! Sorry for my mistakes)