A sterically constrained bis(2,2′:6′,2′′-terpyridine) ligand

Abstract

The title compound, 4,4′-bis­[(2,2′:6′,2′′-terpyridin-4-yl)­ethyn­yl]-2,2′-(3,6,9-trioxaun­decane-1,11-diyl­dioxy)-1,1′-bi­phenylethyl acetate solvate, C54H42N6O5·C4H8O2, is a sterically constrained ligand based on the well-known chelator 2,2′:6′,2′′-ter­pyridine (terpy). Two terpy units are linked by ethynyl bridges to a central 2,2′-bi­phenyl unit, in which the two rings are connected by a polyether strand. The torsion angle between the two rings of the bi­phenyl unit is 113.25 (17)°. The crown ether ring is flexible and capable of complexing metal cations, and the two terpy units may be reorganized from their observed trans-trans configuration to act as terdentate ligands for transition metal ions.