Preparation and complexation of polydentate and macrocyclic ligands incorporating benzimidazole. X-Ray crystal structure of 6,7,9,10,12,13,15,16-octahydro-23H,25H-bis(benzimidazo[1,2-j:2′,1′-o])[1,4,7,13,10,16]tetraoxadiazacyclo-octadecine

Abstract

A number of ligands, including some macrocycles, all with benzimidazole units incorporated, have been synthesised. These co-ordinate Cu^II and other transition metals with the imidazole nitrogen and other donor atoms included in the ligand design. The crystal structure data for a representative macrocycle, 6,7,9,10,12,13,15,16-octahydr-23H,25H-bis(benzimidazo[1,2-j:2′,1′-o])[1,4,7,13,10,16]tetraoxadiazacyclo-octadecine, are presented, together with spectroscopic and other details of representative complexes.