Dinuclear Copper and Zinc Complexes of a Hexaazamacrocycle Containing P-Xylyl Spacers and Bridging Anions: Theoretical and Spectroscopic Studieselectronic Supplementary Information (Esi) Available: Table S1: 1H Nmr Data for Me2[30]Pbz2N6 and Its Zn2+, Cd2+ and Pb2+ Complexes. Table S2: Low Energy Conformations for [Cu2(Me2[30]Pbz2N6)]4+. Fig. S1: Crystal Packing Diagram of Me2[30]Pbz2N6 1. Fig. S2: Species-Distribution Curves Calculated for Cu(Ii)?Me2[30]Pbz2N6 Complexes. See Http://Www.rsc.org/Suppdata/Dt/B3/B306486G/