THERMODYNAMIC STUDY OF COORDINATION REACT IONS OF PARASUBSTITUTED ZINC TETRAPHENYLPORPHYRINS WITH METALLIC SCHIFF-BASE COMPLEXES

Authors
CHEN HW ZHU ZA RUAN WJ ZHANG ZH CHEN SH CHEN RT
Citation
Hw. Chen et al., THERMODYNAMIC STUDY OF COORDINATION REACT IONS OF PARASUBSTITUTED ZINC TETRAPHENYLPORPHYRINS WITH METALLIC SCHIFF-BASE COMPLEXES, Huaxue xuebao, 55(4), 1997, pp. 380-385
Citations number
13
Categorie Soggetti
Chemistry
Journal title
Huaxue xuebao → ACNP
ISSN journal
05677351
Volume
55
Issue
4
Year of publication
1997
Pages
380 - 385
Database
ISI
SICI code
0567-7351(1997)55:4<380:TSOCRI>2.0.ZU;2-R
Abstract
Equilibrium constants for reactions of ZnT(p-X) PP (parasubstituted zi nc tetraphenylporphyrins) with ligands of schiff base complex in CH2Cl 2 and several other solvents have been measured by visible spectral te chniques, and determined by the method of Rose-Drago. Electronic effec ts in metalloporphyrins and effects of ligands, temperature and solven ts were researched. It was found that the equilibrium constants for re actions of ZnT(p-X)PP with ligands follow Hammett equation. The enthal pies and the entropies of reactions were obtained from the plots of ln K(theta) vs. 1/T.