Studies in the coal-tar bases. IV. Lutidine and collidine fractions

Autor:	J. B. Ditcham, J. L. Hales, E. C. Holt, E. A. Coulson
Rok vydání:	2007
Předmět:	chemistry.chemical_classification chemistry.chemical_compound Absorption spectroscopy Base (chemistry) Chemistry medicine Phenol Organic chemistry Picoline Coal tar medicine.drug
Zdroj:	Journal of Applied Chemistry. 2:71-77
ISSN:	1934-998X 0021-8871
Popis:	The lutidine and collidine fractions of coal-tar bases contain as predominating constituents 2:5-, 2:4-, and 2:3-lutidines, 6-ethyl-2-methylpyridine, 3-ethylpyridine, and 2:4:6- and 2:3: 6-collidines. The four first-mentioned bases occur in commercial ‘2: 4–2: 5-lutidine.’ 3-Ethylpyridine has been isolated from a coal-tar collidine for the first time. All these bases form maximum-boiling-point azeotropes with phenol, some of which can be used to effect the concentration or separation of individual bases: 6-ethyl-2-methylpyridine in particular is readily obtained in this way. 2:5-Lutidine forms a high-melting complex with phenol which can be applied to the separation of a high proportion of this base from mixtures in which it occurs. Infra-red absorption spectroscopy provides convenient methods for the analysis of picoline, lutidine and collidine fractions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0a006797e7bdba803015654420a6efc4 https://doi.org/10.1002/jctb.5010020205 Zobrazit plný text záznamu