Is glycinate ligand a monoanion or a zwitterion?
,Assuming glycinate is in its anionic form ($\ce{H2N-CH2-CO2^-}$), one thing to consider is it may not act just as a simple anionic ligand like chloride or hydroxide.  You can count off four atoms from the nitrogen to either carboxyl-ate  oxygen and those atoms both have available electron pairs.  So you add the metal atom and you get a five-membered ring similar to that formed with ethylenediamine.  Thus, glycinate anion may act as a chelating agent.