Abstract
The crystal structures of lanthanide complexes involving the dianions of dihydroxybenzoquinone (H2dhbq) or chloranilic acid (H2can) are presented. The complexes, Ln2dhbq3·24H2O (Ln = Y, La, Ce, Gd, Yb and Lu) are 2-D coordination polymers with metal centres linked by dhbq2− ligands. Each of these species contain a Ln2(H2O)18 pentagonal dodecahedral cage. Despite the variation in the radii of lanthanide ions this series is isostructural. In contrast, the hydrated structures of Ln2can3 (Ln = Sc, Y, La, Pr, Nd, Gd, Tb, Yb and Lu) show considerable structural variation. The crystal structures of the diamond-like networks Ycan2− and Thcan2 are also presented.
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