The molecular and supramolecular structures of three new lead(II) complexes with the pincer-type ligand 4′-chloro-2,2′:6′,2″-terpyridine (TpyCl)

Abstract

Three new 1:1 complexes of lead(II) with the pincer-type ligand 4′-chloro-2,2′:6′,2″-terpyridine (TpyCl), [Pb(TpyCl)(NO 3) 2] n (1), [Pb(TpyCl)(ClO 4) 2] n (2) and [Pb(TpyCl)Br 2] 2 (3), have been synthesized and characterized by X-ray crystal structure determination as well as spectroscopy and thermal analysis. 1 and 2 are coordination polymers in which the coordination polyhedra are linked via nitrate and perchlorate ligands, respectively, to chains. 3 exhibits a dimeric molecular structure with Pb(μ-Br) 2Pb type bridging. In all three compounds the chains and the oligomers are connected to networks via supramolecular interactions which include O···O, C–H···O, C–H···Cl and C–H···Br hydrogen bonding and π– π stacking as well.