Determining direction of equilibrium I am having a lot of trouble with this question. We have to determine if $K$ is greater or less than 1. I at first thought the equilibrium would favor the right side because this could have to do with ligand binding where the negative charge would probably cause binding to occur tighter than the left side.
I was told by someone else that it could favor the left side however due to resonance stabilization present in the molecule. Now I am not sure how to judge if $K$ will be greater or equal to 1.
I got the answer, equilibrium favors the right side because (Cd) is a soft metal and (S) is soft too, so it binds better to (Cd) than (O), in accordance with the HSAB theory.