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Zeitschrift für Naturforschung C

A Journal of Biosciences

Editor-in-Chief: Seibel, Jürgen

Editorial Board: Aigner , Achim / Boland, Wilhelm / Bornscheuer, Uwe / Hoffmann, Klaus

12 Issues per year


IMPACT FACTOR 2017: 0.882
5-year IMPACT FACTOR: 0.912

CiteScore 2017: 0.92

SCImago Journal Rank (SJR) 2017: 0.288
Source Normalized Impact per Paper (SNIP) 2017: 0.448

Online
ISSN
1865-7125
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Volume 29, Issue 7-8

Issues

Stabilities of Vanadyl Complexes with Methionine, Phenylalanine, and Threonine

B.S. Sekhon / S.L. Chopra
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znc-1974-7-804

Abstract

Stepwise formation constants corresponding to 1:1 vanadyl complexes with methionine, phenylalanine and threonine have been determined at 25 °C, and at various ionic concentrations, viz. 0.01, 0.1 and 0.3 ᴍ , maintained by the addition of potassium chloride solution. Thermodynamic stability constants have been obtained by extrapolation of log K values to zero ionic strength. Logarithms of the overall stability constants (log K (u = 0)) are 7.72 for methionine, 7.70 for phenyl­alanine and 7.44 for threonine complexes. The corresponding free energy changes (⊿G0) are - 10.53, - 10.51, - 10.15 kcal-mol-1 respectively.

: Amino Acid Complexes; Vanadyl Complexes; Stability Constant

About the article

Received: 1973-11-30

Revised: 1974-04-09

Published Online: 2014-06-02

Published in Print: 1974-08-01


Citation Information: Zeitschrift für Naturforschung C, Volume 29, Issue 7-8, Pages 336–338, ISSN (Online) 1865-7125, ISSN (Print) 0939-5075, DOI: https://doi.org/10.1515/znc-1974-7-804.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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