Co-ordination to copper(II) by only three nitrogen atoms of a tetra-azamacrocyclic ligand functionalised with two pendant acetate-arms. X-Ray structure of [Cu(L1H2)Cl]Cl, where L1 is 3,11-diacetato-7-methyl-3,7,11,17-tetra-azabicyclo[11.3.1]heptadeca-1(17),13,15-triene

Abstract

The tetrahydrochloride salt of the new ligand 3,11-diacetato-7-methyl-3,7,11,17-tetra-azabicyclo[11.3.1]heptadeca-1-(17),13,15-triene, L¹, has been prepared, and found to react in aqueous solution wit copper(II) sulphate to give [Cu(L¹H₂)Cl]Cl in which the copper(II) has a distorted trigonal bipyramidal geometry, with co-ordination to L¹ through only three of the four nitrogen atoms and only one of the two acetate-arms.