DETERMINATION OF THE RATES OF FORMATION AND HYDROLYSIS OF THE SCHIFF-BASES OF PYRIDOXAL WITH POLYALLYLAMINE

Authors
DELVADO MAG CARDONA AFR GOROSTIDI GRE MARTINEZ MCG BLANCO JGS BLANCO FG
Citation
Mag. Delvado et al., DETERMINATION OF THE RATES OF FORMATION AND HYDROLYSIS OF THE SCHIFF-BASES OF PYRIDOXAL WITH POLYALLYLAMINE, Journal of molecular catalysis. A, Chemical, 101(2), 1995, pp. 137-142
Citations number
12
Categorie Soggetti
Chemistry Physical
Journal title
Journal of molecular catalysis. A, Chemical → ACNP
ISSN journal
13811169
Volume
101
Issue
2
Year of publication
1995
Pages
137 - 142
Database
ISI
SICI code
1381-1169(1995)101:2<137:DOTROF>2.0.ZU;2-3
Abstract
The rate constants of formation (k(1)) and hydrolysis (k(2) of the Sch iff bases formed between pyridoxal (PL) and polyallylamine were determ ined as a function of pH at a temperature of 25 degrees C and an ionic strength I=0.1 M. The k(1) values obtained at every pH studied exceed ed those for the Schiff bases of PL with poly-L-lysine and n-hexylamin e, which is consistent with a favoured intramolecular acid catalysis o f the dehydration of the intermediate carbinolamine formed in the proc ess. The Schiff bases examined in this work lie in a hydrophobic envir onment and the pK for their imine group is smaller than 9.2.