A new NS4 quinquedentate macrocyclic ligand: synthesis, structure and properties of its Ni(ii), Pd(ii), Pt(ii), Cu(ii), Cu(i) and Ag(i) complexesPresented at ISMC-2001 held in Fukuoka, Japan from July 15–20, 2001.Electronic supplementary information (ESI) available: synthetic scheme for macrocyclic complexes 12–17; views of 12, 15 and 16; cyclic voltammograms of 13 and 14. See http://www.rsc.org/suppdata/dt/b2/b206182a/