Kinetic effects induced by cellulose on water-catalyzed reactions. Hydrolysis of 2, 4-dinitrophenyl cellulose xanthate and some sugar xanthate ester analogues

…, M Nunes, CMS Oliveira, PJ Barrie

Index: Humeres, Eduardo; Soldi, Valdir; Klug, Marilene; Nunes, Mauricea; Oliveira, Celia M.S.; Barrie, Patrick J. Canadian Journal of Chemistry, 1999 , vol. 77, # 5-6 p. 1050 - 1056

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Citation Number: 12

Abstract

The hydrolysis of 2, 4-dinitrophenyl cellulose xanthate (CelXDNP) was studied in 10% v/v aqueous ethanol at 25° C and μ= 0.1 (KCl). The water-catalyzed hydrolysis showed that, as for p-nitrobenzyl cellulose xanthate, it occurs through two parallel reactions with rate constants k'H2O= 4.40 x 10-3 s-1 for the fast hydrolysis, and k''H2O= 6.90 x 10-5 s-1 for the slow hydrolysis. The entropy of activation of the fast hydrolysis was 0.7±1.8 cal K-1 mol-1. ...