Add time:08/04/2019         Source:sciencedirect.com

The molecular structure of Y(CH3CO2)3·4H2O has been determined by X-ray diffraction. The crystals are triclinic with space group P1̄ (a=8.867, b=9.368, c=10.587 Å, α=90.30, β=115.65, γ=119.11°). The molecule has a dimeric structure where the yttrium atoms have a ninefold coordination. Yttrium atoms are linked by two chelating bridging (polymeric) acetates. Each metal coordination sphere is completed by two other chelating acetate groups and two water molecules. The title compound and other hydrated rare earth acetates which exhibit different structures (lanthanum, praseodymium and neodymium) have also been investigated by IR and 13C CP-MAS NMR spectroscopies. A correlation between spectroscopic data and coordination mode of the carboxylate groups in rare earth acetates is proposed.

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