Home – Home – Jornals – 2015 number 5

The synthesis, crystal structures, and characterization (IR, TGA/DSC) of [Nd(C ₅H ₆O ₄)·(H ₂O) ₄]·Cl (1) and Pr(C ₅H ₆O ₄)(C ₅H ₇O ₄)(H ₂O)]·H ₂O (2) are described. Compound 1 is a one-dimensional coordination polymer containing double chains incorporating pairs of edge-sharing NdO ₉ 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 PrO ₁₀ 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, C ₅H ₁₄ClNdO ₈, M _r = 381.85, monoclinic, P 2 ₁/ c (No. 14), a = 8.9763(6) Å, b = 15.9277(11) Å, c = 8.8690(6) Å, β = 112.090(2)°, V = 1174.94(14) Å ³, Z = 4, R ( F ) = 0.016, wR ( F ²) = 0.037. 2, C ₁₀H ₁₇O ₁₀Pr, M _r = 438.15, orthorhombic, Pbca (No. 61), a = 16.3030(7) Å, b = 8.6714(4) Å, c = 19.3899(8) Å, V = 2741.1(2) Å ³, Z = 8, R ( F ) = 0.020, wR ( F ²) = 0.050.