Firstly, apologies if this would be better suited to another part of the forum.
I'm wondering does anyone have any experience with any programs which predict the distribution of electrons within a molecule?
I'm not talking about large molecules like peptides or anything, I just need a program which could approximate how electrons are pulled or pushed through a molecule with the removal/addition of substituents. Preferably a free program of course
but any personal experience with any program which has this function, paid or free, would be appreciated.