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Many analogues of pyridine are known where N is replaced by other heteroatoms from the same column of the Periodic Table of Elements (see figure below). Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C 4 H 4 N 2), with the names pyridazine, pyrimidine, and pyrazine.
The following compounds are liquid at room temperature and are completely miscible with water; ... Name CAS number CH 3 CHO: ... pyridine: 110-86-1 C 4 H 8 O 2 S ...
Containing a pyridinium ion, pyridinium chloride has a pK a of approximately 5, slightly more acidic than that of typical amines.This is due to the hybridization of the nitrogen: the nitrogen is sp 2 hybridized and more electronegative than those nitrogens in ammonium cations, which are sp 3 hybridized.
In other projects Wikimedia Commons; Wikidata item; Appearance. move to sidebar hide. ... Pyridine alkaloids (13 P) Pyridine complexes (1 C, 10 P) Pyridinium ...
Other names 2-Pyridinamine; 2 ... Solubility in water >100% [1] Hazards GHS labelling: Pictograms. ... It is produced by the reaction of sodium amide with pyridine, ...
They have also been detected at legacy wood treatment sites. The high water solubility of 3-methyl pyridine increases the potential for the compound to contaminate water sources. 3-methyl pyridine is biodegradable, although it degrades more slowly and volatilize more readily from water samples than either 2-methyl- or 4-methyl-pyridine., [7] [8]
It is the conjugate acid of pyridine. Many related cations are known involving substituted pyridines, e.g. picolines, lutidines, collidines. They are prepared by treating pyridine with acids. [3] As pyridine is often used as an organic base in chemical reactions, pyridinium salts are produced in many acid-base reactions.
Direct halogenation of pyridine with chlorine gas above 270 °C gives a mixture of 2-chloropyridine and 2,6-dichloropyridine. [1] 2- and 4-chloropyridine are prepared from the corresponding pyridinols using phosphoryl chloride. [1]