Pyridine - Wikipedia
网页Pyridine is a basic heterocyclic organic compound with the chemical formula C 5 H 5 N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom (=N−). It is a highly flammable, weakly alkaline, water-miscible liquid with a distinctive, unpleasant fish-like smell.
Pyridine | Aromatic, Aliphatic, Nitrogenous | Britannica
网页2024年8月27日 — pyridine, any of a class of organic compounds of the aromatic heterocyclic series characterized by a six-membered ring structure composed of five carbon atoms and one nitrogen atom. The simplest member of the pyridine family is pyridine itself, a compound with molecular formula C 5 H 5 N.
Pyridine (C5H5N) - Structure, Formula, Molecular Mass, …
网页Pyridine is a chemical product composed of acetaldehyde, ammonia and formaldehyde, combined with a catalyst and reacted at atmospheric pressure of 250-500 degrees Celsius. It is used in pharmaceuticals, solvents and dyes.
24.9: Heterocyclic Amines - Chemistry LibreTexts
网页describe the geometry of the pyridine molecule. account for the difference in basicity between pyridine, pyrrole and other amines. explain why pyridine undergoes electrophilic substitution much less readily than does benzene. identify the presence of a fused‑ring heterocycle in a given structure.
Pyridine | Formula, Properties & Application
网页Chemically designated as C5H5N, pyridine is a simple aromatic ring that forms the basis for many related compounds such as the amino acids tryptophan and niacin. In terms of its physical properties, it is a colorless, flammable liquid that has a …
Pyridine - NIST Chemistry WebBook
网页Pyridine. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java or Javascript. Permanent link for this species. Use this link for bookmarking this species for future reference.
Pyridine - NIST Chemistry WebBook
网页McCullough, J.P.; Douslin, D.R.; Messerly, J.F.; Hossenlopp, I.A.; Kincheloe, T.C.; Waddington, G., Pyridine: experimental and calculated chemical thermodynamic properties between 0 and 1500 K., a revised vibrational assignment, …
Pyridines - Chemistry Online
网页2024年4月22日 — Pyridine is a colorless liquid that boils at 115 ºC. It used to be obtained almost exclusively from coal tar. Today, it is obtained industrially from ammonia and acetylene. Pyridine like benzene has 6 π electrons (aromatic Hückel). Its structure is planar with bond angles of 120º.
Pyridine - NIST Chemistry WebBook
网页All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.
Pyridine - American Chemical Society
网页2020年8月31日 — Pyridine is a colorless liquid with a foul odor and several hazardous properties. In the late 1840s, physician/chemist Thomas Anderson at the University of Edinburgh produced several liquids by heating animal bones to high temperatures.