INTRODUCTION THE IMIDAZOLE RING HAS TWO ADJACENT NUCLEOPHILIC SITES AND ITS STERIC AND ELECTRONIC PROPERTIES CAN BE MODIFIED BY THE SUBSTITUENTS AT DIFFERENT POSITIONS ON THE RING. THE IMIDAZOLE CAN COORDINATES AS A monoDENTATE LIGAND TO THE METAL IONS VIA THE PYRIDINE-TYPE NITROGEN. HOWEVER THE PYRROLE-TYPE NITROGEN (N-H) CAN FORM HYDROGEN BONDS WITH HYDROGEN ACCEPTOR AND/OR HYDROGEN DONOR POSITIONS. ON THE OTHER HAND, THE IMIDAZOLATE ANION CAN FUNCTION AS A BRIDGE LIGAND THROUGH BOTH NITROGENS AFFORDING POLYNUCLEAR COMPLEXES OF INTRIGUING STRUCTURAL DIVERSITIES, PROPERTIES AND REACTIVITIES, NOT FOUND FOR monoNUCLEAR COMPLEXES.