| Abstract
| - Carbonate is generally a strongly complexing ligand for f-element ions, including trivalent lanthanides. The few lanthanide(III) carbonates previously characterized have extended multidimensional solid state structures. Spectroscopic and solubility studies indicate that the solution species are monomeric; however, structural details remain unknown. We report the first single-crystal structure of a discrete mononuclear Nd(III) carbonate, the guanidinium salt of Nd(CO3)4(H2O)5-, which corresponds directly to a species formed in highly concentrated carbonate solutions.
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