Two-dimensional rare earth coordination polymers involving different coordination modes of thiodiglycolic acid

Two coordination polymers [La-2(tdga)(3)(H2O)(2)](n) (1) and {[Pr-2 (tdga)(3) (H2O)(2)] (.) H2O}(n) (2) were obtained by the reaction between Ln(OH)(3) (Ln = La, Pr) and thiodiglycolic acid (H(2)tdga = H2S(CH2CO2)(2)). which have a novel double-layered and a single-layered structure, respectively. In the complexes, new coordination modes of the ligand were observed. (C) 2002 Elsevier Science B.V. All rights reserved.