PREPARATION AND CRYSTAL STRUCTURES OF LaCl₃(15-crown-5) AND [LaCl₂(phen)(H₂O)₂(ü-Cl)]₂· (15-crown-5) · MeCN

Abstract

Abstract LaCl3(15-crown-5), I was prepared by the reaction of LaCl3·nH2O with 15-crown-5 and bipy (2,2′-bipyridy 1). [LaCl2(phen)(H2O)2(μ-Cl)]2·(15-crown-5)·MeCN, II, was crystallized from a mixture of LaCl3·nH2O, phen (1,10-phenanthroline) and 15-crown-5 in MeOH/MeCN, Crystal structures of these two complexes have been determined by X-ray methods. The La(III) ion in I is coordinated by three Cl anions and five oxygen atoms of a crown ether. The two metal ions in II are bridged by two Cl anions and the crown ligand is hydrogen-bonded to the coordinated water molecules to form polymeric… crown/cation/cation/crown… chains.