Formula: C6H5NO3. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-Hydroxynicotinic acid, is researched, Molecular C6H5NO3, CAS is 27828-71-3, about Two- and three-dimensional lanthanide metal-organic frameworks with hydroxyl-functionalized nicotinic acid and oxalate ligands. Author is Zhang, Jin; Huang, Jing; Yang, Jun; Chen, Hong-Ji.
LMOFs, consisting of three groups of isostructural compounds, [Ln(3-H-5-phenoxonicotinato)(ox)(H2O)2]n 1 (Ln = La(1a), Pr(1b), Nd(1c), 5-Hydroxynicotinic acid = C6H5NO3, ox = C2O42-), {[Ln(3-H-5-hydroxynicotinato)(ox)1.5(H2O)]·H2O}n 2 [Ln = Sm(2a), Gd(2b), Tb(2c)], and {[Ln(3-H-5-phenoxonicotinato)(ox)(H2O)]·H2O}n 3 (Ln = Dy(3a), Er(3b)), were hydrothermally synthesized and structurally determined by x-ray diffraction analyses. Compounds in Group 1 are constructed by mixed μ3-3-H-5-phenoxonicotinato and oxalate bridging ligands and Ln3+ ions, exhibiting a 3-dimensional covalent network with empty 1-dimensional microchannels, featuring a 3,5-connected topol. Compounds in Group 2 present a brick-well-liked 2-dimensional network generated by both metal ions and oxalate groups at a side-by-side way. Compounds in Group 3 are isotopol. to those in Group 1, accompanying 1-dimensional microchannels being occupied by coordinated H2O mols. Antiferromagnetic interactions between Pr metal centers are observed from the magnetic susceptibility of compound 1b. Luminescence measurements indicate that the Tb complex 2c is a strong green luminescence emitter.
Different reactions of this compound(5-Hydroxynicotinic acid)Formula: C6H5NO3 require different conditions, so the reaction conditions are very important.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method