Aggregation of l-Cysteinato Tricobaltate(III) Anions by Lanthanide(III) Cations into Dimensional Structures That are Controlled by Diastereoisomerism and Ionic Size

Abstract Treatment of the ΛLLLΛLLL and ΔLLLΔLLL isomers of K3[Co{Co(l-cys-N,S)3}2] (K3[1], l-cys: l-cysteinate) with Ln(NO3)3 (Ln = La and Yb) in water gave coordination polymers, ΛLLLΛLLL-Ln[1] and ΔLLLΔLLL-Ln[1], respectively, in which [1]3− binds to Ln3+ through carboxylate groups in a 1:1 ratio. It was found that the dimensional structures of Ln[1] are controlled not only by the diastereoisomerism of [1]3− (ΛLLLΛLLL vs. ΔLLLΔLLL) but also by the ionic size of Ln3+ (La3+ vs. Yb3+).