BINDING OF POLYANIONS BY BIOGENIC-AMINES - I - FORMATION AND STABILITY OF PROTONATED PUTRESCINE AND CADAVERINE COMPLEXES WITH INORGANIC ANIONS

The formation and stability of proton diamine-inorganic anion [Cl-, SO 42-, HPO42-, P2O74- and Fe(CN)(6)(4-)] complexes was studied potentiom etrically [(H+)-glass electrode] at 25 degrees C. Several general form ula ALH, complexes are formed in these various systems. The stability of complexes formed between H(2)A(2+) and different anions ranges from one to six (log formation constants). The formation constants are sli ghtly dependent on the length of the alkylic chain whilst they strongl y depend on the anion charge. A general relationship [log K = -0.85 1.81z - 0.055n] was found for the reaction H(2)A(2+) + Lz- = ALH(2)((2 -z)) [L = inorganic anions, A = NH2 - (CH2)(n) - NH2 diamines with n = 2...8]. (C) 1998 Elsevier Science B.V. All rights reserved.