Samarium acetylacetonate is a coordination compound with the formula Sm(C5H7O2)3. This anhydrous acetylacetonate complex is widely discussed but unlikely to exist per se. The 8-coordinated dihydrate Sm(C5H7O2)3(H2O)2 is a more plausible formula based on the behavior of other lanthanide acetylacetonates. The dihydrate has been characterized by X-ray crystallography.[1][2] Upon attempted dehydration by heating under vacuum, other hydrated lanthanide tris(acetylacetonate) complexes decompose to give oxo-clusters.[3]
Consistent with the stability of 8-coordinate derivatives is the Sm(C5H7O2)3(1,10-phenanthroline).[4] Furthermore, recrystallization of the dihydrate from DMSO gives Sm(acac)3·2DMSO·H2O.[5]
^Cambridge Crystallographic Data Center, number CCDC 1121251.
^Tamang, Sem Raj; Singh, Arpita; Bedi, Deepika; Bazkiaei, Adineh Rezaei; Warner, Audrey A.; Glogau, Keeley; McDonald, Corey; Unruh, Daniel K.; Findlater, Michael (2020). "Polynuclear Lanthanide–Diketonato Clusters for the Catalytic Hydroboration of Carboxamides and Esters". Nat. Catal. 3 (2): 154–162. doi:10.1038/s41929-019-0405-5. S2CID209897045.
^Urs, Usha K.; Shalini, K.; Cameron, T. S.; Shivashankar, S. A.; Guru Row, T. N. (2001). "Low-temperature structure of a twinned crystal of tris(2,4-pentanedionato)(1,10-phenanthroline)samarium(III)". Acta Crystallographica Section E. 57 (10): m457–m458. Bibcode:2001AcCrE..57M.457U. doi:10.1107/S1600536801014398. S2CID96226655.
^Dzyubenko, N. G.; Kalenichenko, Yu. V.; Martynenko, L. I. Rare Earth tris(acetylacetonate) Adducts with DMSO(in Russian). Zhurnal Neorganicheskoi Khimii, 1988. 33 (1): 52-58.
^Shankar, Gopalan; Ramalingam, Suthamalli K. (1984). "Phenylisocyanation and bromination studies on lanthanide β-diketonates". Transition Metal Chemistry. 9 (12): 449–453. doi:10.1007/BF00620675. ISSN0340-4285. S2CID93106389.
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