SYNTHESIS AND STRUCTURE OF DIASTEREOMERIC DINUCLEAR COPPER-COMPLEXES

Depolymerisation of a copper(II)/pyrrolidine-based 2D-polymer 2 by 4,4 '-bipyridyl [molar ratio: 2 (CuL(2)):1(Bipy)] and recrystallisation of the reaction product leads to two visually distinguishable crystal ch arges, composed of dark green octahedra meso-4 and light green rod-sha ped crystals racem-5. Separation of the conglomerate of the morphologi cally different crystals is accomplished by pick out. The structure of the dinuclear complex racem-5 has been established unambigously by X- ray structure analysis. EPR and susceptibility measurements of mixture s of complex meso-4 and racem-5 indicate that there is no interaction between the two copper(II) centres.