title: catena-Poly[[[(1,10-phenanthroline-κ(2)N,N')praseodymium(III)]-di-μ-4-hydroxy-benzoato-κ(4)O(1):O(1')-μ-nitrato-κ(3)O,O':O] bis-(1,10-phenanthroline)].
abstract: The title complex, [Pr(C(7)H(5)O(3))(2)(NO(3))(C(12)H(8)N(2))]·2C(12)H(8)N(2), has a polymeric chain structure, with two uncoordinated 1,10-phenanthroline mol-ecules in the lattice. The Pr(III) centre has a monocapped square-anti-prismatic coordination geometry, comprised of two N atoms from one chelating 1,10-phenanthroline ligand, four carboxyl-ate O atoms from four 4-hy-droxy-benzoate anions and three O atoms from two nitrate anions. The 4-hy-droxy-benzoate and nitrate anions function as μ(2)-bridging ligands and link the Pr(III) ions into a one-dimensional chain structure along the c axis. Inter-molecular O-H⋯N hydrogen bonds are observed between the 4-hy-droxy-benzoate anions and the uncoordinated 1,10-phenanthroline mol-ecules.
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018,  People's Republic of China.
authors.forename: Panfeng
authors.initials: P
authors.lastname: Wang
authors.forename: Dingding
authors.initials: D
authors.lastname: Xu
authors.forename: Xinqing
authors.initials: X
authors.lastname: Wang