Self-Assembly of Coordination Polymers from AgX (X = SbF6–, PF6–, and CF3SO3–) and Oxadiazole-Containing Ligands was written by Dong, Yu-Bin;Cheng, Jun-Yan;Huang, Ru-Qi;Smith, Mark D.;Zur Loye, Hans-Conrad. And the article was included in Inorganic Chemistry in 2003.Category: pyridine-derivatives This article mentions the following:
The coordination chem. of the oxadiazole-containing rigid bidentate ligands 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (L1), 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (L2), and 2,5-bis(3-aminophenyl)-1,3,4-oxadiazole (L3) with inorganic Ag(I) salts was studied. Four new coordination polymers (1, 2, 3, and 5) and one new bimetallic macrocyclic supramol. complex (4) were synthesized from solution reactions of L1-L3 with inorganic Ag(I) salts, resp. {[Ag(L1)]SbF6}n (1, monoclinic, space group P21/c, a 6.6846(4), b 27.1113(15), c 8.6802(5) Å, β 94.1080(10)°, Z = 4) and {[Ag(L1)]PF6}n (2, monoclinic, space group P21/c, a 6.6753(3), b 27.2824(14), c 8.2932(4) Å, β 94.6030(10)°, Z = 4) were obtained from the reactions of L1 with AgSbF6 and AgPF6 in a CH2Cl2/CH3OH mixed solvent system, resp. Compounds 1 and 2 are isostructural and feature a novel two-dimensional zeolite-like net with two different individual rings. {[Ag(L2)]SbF6}n (3, monoclinic, space group P21/c, a 5.5677(3), b 17.3378(9), c 15.6640(8) Å, β 94.4100(10)°, Z = 2) and [Ag2(L2)2](SbF6)2 (4, triclinic, space group P1̅, a 8.7221(5), b 9.2008(6), c 10.7686(7) Å, α 70.6270(10), β 75.7670(10), γ 73.7560(10)°, Z = 1) were obtained from 1-pot reaction of L2 with AgSbF6 in a CH2Cl2/CH3OH mixed solvent system. Compound 3 features a 1-dimensional chain pattern, while compound 4 adopts a novel bimetallic macrocyclic structural motif which consists of Ag2(L2)2 ringlike units (crystallog. dimensions, 8.06 × 7.42 Å2). {[Ag(L3)]SO3CF3}n (5) is generated from L3 and AgSO3CF3 in a CH2Cl2/CH3OH mixed solvent system and crystallizes in the unusual space group Pbcn, with a 9.8861(5), b 20.2580(10), c 17.5517(8) Å, Z = 8. It adopts novel two-dimensional sheets that are cross-linked to each other by strong interlayer N-H···O hydrogen bonding interactions into a novel H-bonded three-dimensional network. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Category: pyridine-derivatives).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Category: pyridine-derivatives