Lanthanum acetylacetonate refers to the coordination complex with the formula . This anhydrous acetylacetonate complex has not been characterized well, but the dihydrate has been characterized by X-ray crystallography.
Upon heating under vacuum, the dihydrate converts to the oxo-cluster . This behavior is also observed for erbium, yttrium, gadolinium, and europium.
The instability constants (logYn) are 3.65, 5.13 and 6.12 (corresponding to n=1, 2, 3) have been reported for "La(acac)3". It can be prepared by the reaction of lanthanum alkoxide and acetylacetone.Gavrilenko, V. V.; Chekulaeva, L. A.; Savitskaya, I. A.; Garbuzova, I. A. Synthesis of yttrium, lanthanum, neodymium, praseodymium and lutetium alkoxides and acetylacetonates. Izvestiya Akademi Nauk, Seriya Khimicheskaya, 1992. 11: 2490-2493. . Its tetrahydrate decomposes into monohydrate at 110 °C, obtains the anhydrous form at 150 °C, undergoes La(CH3COO)(acac)2 and La(CH3COO)2(acac), and at 180~285 °C lanthanum acetate is produced. It can be used to prepare NaLaS2, La2Zr2O7 and other materials.
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