Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents

Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method. The values of the rate constants of the investigated acids in protic solvents were higher...

Full description

Saved in:
Bibliographic Details
Published inJournal of the Serbian Chemical Society Vol. 70; no. 4; pp. 557 - 567
Main Authors ALEKSANDAR D. MARINKOVIC, SASA Z. DRMANIC, BRATISLAV Z. JOVANOVIC, MILICA MISIC-VUKOVIC
Format Journal Article
LanguageEnglish
Published Serbian Chemical Society 01.04.2005
Subjects
diazodiphenylmethane
protic and aprotic solvents
pyridine carboxylic acids
rate constants
solvent parameters
Online AccessGet full text

Cover

More Information
Summary:Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method. The values of the rate constants of the investigated acids in protic solvents were higher than those in aprotic solvents. The second order rate constants were correlated with solvent parameters using the Kamlet-Taft solvatochromic equation in the form: log k = log k0 + sp* + aa + bb . The correlation of the obtained kinetic data were performed by means of multiple linear regression analysis taking appropriate solvent parameters. The signs of the equation coefficients were in agreement with the postulated reaction mechanism. The mode of the influence of the solvent on the reaction rate in all the investigated acids are discussed on the basis of the correlation results.
ISSN:0352-5139