Hey, I'm working on a rather big chemistry assignment. Right now I'm looking at a reaction mechanism. The first step is illustrated in the attachment. The big thing with the loop represents a glucose molecule, and on the bottom there is some Pd+Bi attached to active coal as an adsorbent (if i'm using the wrong terms, sorry, I never got any other chem education than in Dutch). Now, it says that an electron is displaced from the Pd to the Bi, but it seems to assume that I know why. It's not an actual part of the assignment, and I don't really need it, but I'd like to know why that electron is moved. I've been thinking about electronegativity (Pd 1.4, Bi 1.7), but that can't be all, I think. Any suggestions?