Inorganic Chemistry, Vol.36, No.2, 134-135, 1997
Structural Demonstration of the Role of Ligand Framework Conformability in Copper(II)/Copper(I) Redox Potentials
Two macrocyclic CuN2S2 complexes are described. In the larger (16-membered) macrocycle, a butylene linkage allows the ligand to accommodate the pseudotetrahedral geometry of the copper-(I) form, thus elevating the Cu-II/Cu-I E(1/2) value in comparison with the 15-membered ring’s complex. This is the first crystallographic demonstration of this flexibility factor.