catena-Poly[[(1,10-phenanthroline-κ2N,N′)praseodymium(III)]-di-μ-phenoxyacetato-κ4O:O′-[(1,10-phenanthroline-κ2N,N′)praseodymium(III)]-di-μ-phenoxyacetato-κ4O:O′-di-μ-phenoxyacetato-κ3O,O′:O;κ3O:O,O′]

The title complex, [Pr2(C8H7O3)6(C12H8N2)2]n, which has an inversion centre midway between the two PrIII atoms of the structural unit, forms a one-dimensional polymer bridged alternately by either two bidentate, or two bidentate and two terdentate, phenoxy­acetate carboxyl­ate groups. Each PrIII atom is thus nine-coordinated by two N atoms of a 1,10-phenanthroline ligand and seven O atoms from six phenoxy­acetate ligands. The coordination geometry at the PrIII atom is distorted tricapped trigonal prismatic. One phenyl ring is disordered over two positions; the site occupancy factors are ca 0.6 and 0.4.