Category: catalyst-palladium. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5-Hydroxynicotinic acid, is researched, Molecular C6H5NO3, CAS is 27828-71-3, about A 2-dimensional gadolinium(III) coordination polymer with 5-hydroxynicotinic acid and oxalate ligands and magnetic property. Author is Mi, Jun-long; Huang, Jing; Chen, Hong-ji.
A new coordination polymer, [Gd(III)(3-H-5-hydroxynicotinato)(ox)1.5(H2O)2]n, was synthesized by a hydrothermal reaction of Gd(NO3)3 with 5-hydroxynicotinic acid and ammonium oxalate, and its structure was determined by x-ray crystallog. with the following data: triclinic space group P1̅, C9H9NO11Gd, Mr = 464.42, a = 7.5545(11), b = 8.1094(12), c = 10.6947(16) Å, α = 103.493(2), β = 98.385(2), γ = 92.117(2)°, Z = 2, V = 628.57(16) Å3, F(000) = 444, Dc = 2.454 g.cm-3, μ = 5.341 mm-1, the final R = 0.0188 and wR = 0.0392 for 2634 observed reflections (I > 2σ(I)). In the asym. unit of the compound, each Gd(III) ion is bonded to 9 O atoms from 3-H-5-hydroxynicotinato and oxalate groups and terminal-coordinated water mols., resp., resembling a highly distorted 3-capped trigonal geometry. Adjacent GdO9 coordination polyhedra are bridged by 3 identical independent oxalate groups in a side-by-side manner forming brickwall-like 2D grids, and then further linked through intermol. H-bonds generating a 3D supramol. network. Magnetic anal. of the compound shows that weak antiferromagnetic coupling exists among the adjacent Gd(III) ions.
This literature about this compound(27828-71-3)Category: catalyst-palladiumhas given us a lot of inspiration, and I hope that the research on this compound(5-Hydroxynicotinic acid) can be further advanced. Maybe we can get more compounds in a similar way.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method