Synthesis of the terpyridyl pendant-arm azamacrocycle 4′-(p-1,4,7-triazacyclonon-1-ylmethylphenyl)-2,2′∶6′,2′′-terpyridine (L) and complexes of L with copper(II) and nickel(II). Crystal structure of [Cu(HL)(H2O)2][PF6]3

Abstract

The azamacrocyclic ligand 4′-(p-1,4,7-triazacyclonon-1-ylmethylphenyl)-2,2′∶6′,2′′-terpyridine (L) has been prepared, and some of the complexes it forms with hydrated copper(II) and nickel(II) have been isolated as the [PF₆]⁻ salts. X-Ray crystallography has been used to determine the solid state structure of the distorted trigonal bipyramidal complex [Cu(HL)(H₂O)₂][PF₆]₃, in which the copper(II) is co-ordinated to the terpyridyl group and the azamacrocycle is monoprotonated and non-co-ordinating. A bis(2,2′∶6′,2′′-terpyridine)nickel(II) complex, [Ni(H₂L₂)₂][PF₆]₆ has also been isolated, in which each azamacrocycle is diprotonated.