[Chimera-users] Animate a Reacton Mechanism?

I constructed a movie for the first part of a reaction mechanism (substrate docking). I would like the animated mechanism to continue as follows. The substrate donates a proton to a tyrosine residue of the enzyme, forming an intermediate. The intermediate rotates 180 (I have accomplished this part) and the proton rebounds to the intermediate forming a new product, which is released. I can animate the product release -- it's the reverse of substrate docking. The part of the animation I cannot envisage is how to smoothly show or morph the bond transitions (bond breaking and making) during the reaction progression. IAny advice on whether Chimera or other ancillary software can do this is appreciated.