ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
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Chelating agents derived from cysteine. Synthesis, dissociation constants and complexes with silver(I)

M. Struhár, L. Sirotková, and E. Dvořáková

Pharm. Fac., Komensky Univ., Bratislava

 

Abstract:  Compounds of the type of alkanedithio-bis(2-aminopropane) acids were prepared by the reaction of dihalogenoalkane (namely dibromomethane, 1,2-dibromoethane, 1,3-dibromopropane, 1,4-dibromobutane, and 1,3-dichloro-2-propanol) with L-cysteine. Values of рKа were determined and the complex formation with Ag(I) was followed from the potentiometrical neutralization curves (I = 0.10 M, KNO3, 20°C). Complexes with the ratio M : L = 1 1 and hydrogeno complexes are formed. The effect of lengthening of the carbon chain as well as the presence of covalently bonded sulfur was followed.

Full paper in Portable Document Format: 296a740.pdf (in German)

 

Chemical Papers 29 (6) 740–744 (1975)

Tuesday, January 26, 2021

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