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
S. Hussain1, I.U. Khan1, W.T.A. Harrison2, M.N. Tahir3
1Government College University, Lahore, Pakistan
sajjaduet07@yahoo.com
2University of Aberdeen, Aberdeen, Scotland
w.harrison@abdn.ac.uk
3University of Sargodha, Sargodha, Pakistan
Ключевые слова: synthesis, crystal structure, coordination polymer, neodymium, praseodymium
Страницы: 993-1000
Подраздел: КРИСТАЛЛОХИМИЯ
Аннотация
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.
DOI: 10.15372/JSC20150516 |
