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.

[1][2] Upon attempted dehydration by heating under vacuum, other hydrated lanthanide tris(acetylacetonate) complexes decompose to give oxo-clusters.

[5] Samarium(III) acetylacetonate react with N-bromosuccinimide to give the ring-brominated derivative.