EQUILIBRIUM AND SPECTRAL STUDIES OF PUTRESCINE COMPLEXES WITH COPPER(II)

It has been found that in the putrescine-copper system several types of complex compounds (MHL, ML, ML2, ML,OH) are formed. In the pH range of 7-9, despite a multiple excess of ligand, a precipitation occurs. When adenosine is introduced to the system, the ability to observe the complexation reaction in solution is largely increased, because the additional ligand prevents precipitation. On the basis of computer analysis of potentiometric titration data the stability constants of the compounds have been determined. The coordination mode of the complexes is discussed.