The structural and electrochemical consequences of hydrogenating copper N2S2 Schiff base macrocycles

A series of tetradentate copper macrocyclic complexes, which employ amine and thioether donor groups are reported. Apart from cis-[Cu(H4NbuSen)]+ all of the complexes are obtained in the copper(II) form. Crystallographic analysis shows that the copper(II) complexes all adopt a distorted planar geometry. In contrast, cis-[Cu(H4NbuSen)]+ adopts a distorted tetrahedral geometry. The complexes were subjected to electrochemical analysis and the effect of the solvent and the donor atoms positions on E1/2 discussed.