spectroscopic and other evidence suggested that the sugar anion binds monodentately in the [ co ( nh3 ) 5 ascorbate ] 2+ cation via the ionized o3 oxygen atom and bidentately in [ co ( nh3 ) 4 ascorbate ] 2+ through the o1 and o4 oxygen atoms , resulting in a six-coordinate geometry around the co ( iii ) ion .
C0003075
anion
C0022023
ion