Studies of the complex formation between some proton sponges and Cu(II) cations

The complex formation for two different types of proton sponges (2-methylsp arteine, 13-hydroxylupanine and three 1,2-bis(dialkylaminomethyl) benzenes, (alkyl similar or equal to methyl, ethyl or pyperidil)) with Cu(II) cation in ethanol was studied by kinetic, potentiometric and MS methods. The stud ied proton sponges with Cu(II) cation formed 1:1 and 1:2 complexes. The kin etic parameters and the equilibrium constants of their formation were deter mined. Both kinetic and thermodynamic parameters depend strongly on the str ucture of the proton sponge. (C) 2001 Elsevier Science B.V. All rights rese rved.