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Bald E. Analytical utility of 2-halopyridinium salts-II Acidimetric determination of thiol groups. Talanta. 1980;27(3):281-2doi: 10.1016/0039-9140(80)80057-9.
Bald, E. (1980). Analytical utility of 2-halopyridinium salts-II Acidimetric determination of thiol groups. Talanta, 27(3), 281-2. https://doi.org/10.1016/0039-9140(80)80057-9
Bald, E. "Analytical utility of 2-halopyridinium salts-II Acidimetric determination of thiol groups." Talanta vol. 27,3 (1980): 281-2. doi: https://doi.org/10.1016/0039-9140(80)80057-9
Bald E. Analytical utility of 2-halopyridinium salts-II Acidimetric determination of thiol groups. Talanta. 1980 Mar;27(3):281-2. doi: 10.1016/0039-9140(80)80057-9. PMID: 18962663.
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Talanta. 1980 Mar;27(3):281-2. doi: 10.1016/0039-9140(80)80057-9.

Analytical utility of 2-halopyridinium salts-II Acidimetric determination of thiol groups.

Talanta

E Bald

Affiliations

  1. Department of Chemical Technology, Lodz University, 18 Nowotki Street, 91-416 Lodz, Poland.

PMID: 18962663 DOI: 10.1016/0039-9140(80)80057-9

Abstract

2-Chloro-1-methylpyridinium iodide reacts rapidly and quantitatively with thiol groups in the presence of excess of triethylamine to give the 2-alkyl(aryl)thio-1-methylpyridinium iodide and an equimolar amount of hydrogen chloride which is trapped by the triethylamine. The excess of triethylamine is back-titrated with hydrochloric acid, with Bromothymol Blue as indicator.

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