Crystal structures and characterization of two rare-earth-glutarate coordination networks: One-dimensional [Nd(C5H6O4)(H2O)4]•Cl and three-dimensional [Pr(C5H6O4)(C5H7O4)(H2O)]•H2O

Abstract

The synthesis, crystal structures, and characterization (IR, TGA/DSC) of [Nd(C5H6O4)(H2O)4]•Cl (1) and [Pr(C5H6O4)(C5H7O4)(H2O)]•H2O (2) are described. Compound 1 is a one-dimensional coordination polymer containing double chains incorporating pairs of edge-sharing NdO9 polyhedra linked by glutarate dianions. A network of O–H…O and O–H…Cl hydrogen bonds helps to consolidate the structure. Compound 2 is a three-dimensional coordination polymer incorporating chains of edge-sharing PrO10 polyhedra. Its glutarate ion adopts an extended conformation, whereas its hydrogen glutarate ion takes on a twisted conformation. O–H…O hydrogen bonds are seen in the crystal structure, which features small channels occupied by water molecules. Crystal data: 1, C5H14ClNdO8, Mr = 381.85, monoclinic, P21/c (No. 14), a = 8.9763(6) A, b = 15.9277(11) A, c = 8.8690(6) A, β = 112.090(2)°, V = 1174.94(14) A3, Z = 4, R(F) = 0.016, wR(F2) = 0.037. 2, C10H17O10Pr, Mr = 438.15, orthorhombic, Pbca (No. 61), a = 16.3030(7) A, b = 8.6714(4) A, c = 19.3899(8) A, V = 2741.1(2) A3, Z = 8, R(F) = 0.020, wR(F2) = 0.050.