[Pr2(pdc)3(Hpdc)(H2O)4]n·n(H3hp)·8n(H2O), a One-Dimensional Coordination Polymer Containing PrO6N3 Tri-Capped Trigonal Prisms and PrO8N Mono-Capped Square Anti-Prisms (H2pdc = Pyridine 2,6-Dicarboxylic Acid, C7H5NO4; 3hp = 3-Hydroxy Pyridine, C5H5NO)

Crystals

Shahzad Sharif²  Onur Sahin¹  Islam Ullah Khan²  Orhan Büyükgüngör¹ 

[1] Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, Samsun, Turkey;;Materials Chemistry Laboratory, Department of Chemistry, Government College University, Lahore-54000, Pakistan

关键词: one-dimensional coordination polymer;    nine-coordination;    praseodymium;    intercalation;   

DOI  :  10.3390/cryst2031253

来源: mdpi

【 摘 要 】

The synthesis, structure and some properties of the one-dimensional coordination polymer, [Pr₂(pdc)₃(Hpdc)]_n·n(H3hp)·8n(H₂O), (H₂pdc = pyridine 2,6-dicarboxylic acid, C₇H₅NO₄; 3hp = 3-hydroxypyridine, C₅H₅NO) are described. One of the Pr³⁺ ions is coordinated by two O,N,O-tridentate pdc²⁻ ligands and one tridentate Hpdc⁻ anion to generate a fairly regular PrO₆N₃ tri-capped trigonal prism, with the N atoms acting as the caps. The second Pr³⁺ ion is coordinated by one tridentate pdc²⁻ dianion, four water molecules and two monodentate bridging pdc²⁻ ligands to result in a PrO₈N coordination polyhedron that approximates to a mono-capped square-anti-prism. The ligands bridge the metal-atom nodes into a chain, which extends in the [100] direction. The H3hp⁺ cation and uncoordinated water molecules occupy the inter-chain regions and an N–H⋯O and numerous O–H⋯O hydrogen bonds consolidate the structure. The H3hp⁺ species appears to intercalate between pendant pdc rings to consolidate the polymeric structure. Crystal data: 1 (C₃₃H₄₃N₅O₂₉Pr₂), M_r = 1255.54, triclinic, (No. 2), Z = 2, a = 13.2567(1) Å, b = 13.6304(2) Å, c = 13.6409(2) Å, α = 89.695(1)°, β = 63.049(1)°, γ = 86.105(1)°, V = 2191.16(5) ų, R(F) = 0.033, wR(F²) = 0.084.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.