Equilibria in complexes ofN-heterocyclic molecules, part XXII. The reaction of triaquo(2,4,6-tri-(2-pyridyl)-1,3,5-triazine) copper(II) and its nickel(II) and cobalt(II) analogues with water and hydroxide ion

Abstract

The kinetics of the reaction of [Cu(TPT)(H2O)3]2+ and [Ni(TPT)(H2O)3]2+ with H2O have been followed and it has been shown that the formation of covalent hydrates is important in the understanding of these systems. The [Co(TPT)(OH)3]− compound and its Ni analogue are attacked by HO− initially to form pseudo-base species and in, the case of Ni , the ligand then hydrolyses to yield a compound related to the carboximate formed when HO− reacts with [Cu(TPT)(OH)3]−. In this reaction too, the formation of a pseudo-base, involving attack of HO− at the triazine ring in the ligand is significant.