Structural Characterization of Heterodinuclear ZnII-LnIII Complexes (Ln = Pr, Nd) with a Ring-Contracted H2valdien-Derived Schiff Base Ligand

Abstract Synthesis and structural characterization of two heterodinuclear Zn II -Ln III complexes with the formula [ZnLn(HL)(µ-OAc)(NO 3 ) 2 (H O) x (MeOH) 1-x ]NO · n H O MeOH [Ln = Pr ( 1 ), Nd )] crystal molecular structure [ZnNd(HL)(µ-OAc)(NO O)] [ZnNd(HL)(OAc)(NO O)](NO are reported. The asymmetrical compartmental ligand E )-2-(1-(2-((2-hydroxy-3-methoxybenzylidene)amino)-ethyl)imidazolidin-2-yl)-6-methoxyphenol L) is formed from N , -bis(3-methoxysalicylidene)diethylenetriamine valdien) through intramolecular aminal formation, resulting in a peripheral imidazoline ring. structures – were revealed by X-ray crystallography. smaller ion occupies inner compartment ligand, whereas larger more oxophilic Ln ions found outer ’ site. Graphic (Ln Pr, Nd) bearing an situ formation