Tris(acetyl­acetonato-κ²O,O′)(1,10-phenanthroline-κ²N,N′)erbium(III)

The title compound, [Er(C₅H₇O₂)₃(C₁₂H₈N₂)], is a mixed-ligand metal–organic precursor for chemical vapour deposition, with the Er atom being eight-coordinate. The coordination polyhedron, described as a distorted square anti­prism, is formed by three bidentate (chelating) acetyl­acetonate residues and a phenanthroline ligand in the apical positions. Mol­ecular assembly via C—H...O hydrogen bonds generates a sheet structure in the ac plane. Weak co-operative C—H...π inter­actions form mol­ecular dimers and contribute to the stability of the inter­sheet packing. The supra­molecular assembly contains voids which form hydro­phobic porous channels, surrounded by a cluster of dimers.