Tetrakis(μ-2-phenoxypropionato)-κ3O,O′:O′;κ3O:O,O′;κ4O:O′-bis[(1,10-phenanthroline-κ2N,N′)(2-phenoxypropionato-κ2O,O′)holmium(III)

Abstract

The title compound, [Ho2(C9H9O3)6(C12H8N2)2], lies about a centre of symmetry and is comprised of six 2-phen­oxy­propionate (POPA) anions and two 1,10-phenanthroline (phen) ligands. The two HoIII ions are linked by four POPA groups utilizing both bi- and tridentate bridging modes to form an inversion-symmetric dimer. Each HoIII ion is nine-coordinate, with a chelating 1,10-phenanthroline mol­ecule, one bidentate chelating carboxyl­ate group, two bidentate bridging carboxyl­ate groups and two tridentate bridging carboxyl­ate groups in a distorted mono-capped square anti­prism geometry. There are weak π–π aromatic inter­actions between the phen groups and aromatic rings of the POPA ligands [centroid–centroid distance = 3.829 (1) Å].