Your question does not make any sense. 

I disagreed, every doubt make sense. And what I am asking is to where goes the electron and the ligand when two coordination spheres are bound to witch other by that ligand, does the electron go with the ligand and reduce the new metal where it bound or the ligand left the origin metal without oxidate it.

It's difficult to understand what you are asking. It looks like you are asking something related to the inner sphere electron transfer mechanism

And it is related to that , i just want to understand if the metal ion that is coordenate to the  ligand that makes the bridge beetween the other central metal complex ions will oxidate or reduct because to me dont make sense something loose a eletron and a ligand and reduct like this image shows 

Dear Mauro, 

I don't understand yet your question. This might help you to formulate the question;

https://en.wikipedia.org/wiki/Inner_sphere_electron_transfer