Thermodynamic Study of Some Pyridinium Ion Derivatives with 18-Crown-6, Aza-18-crown-6 and 1,10-Diaza-18-crown-6 in Acetonitrile

• Autorzy: Ganjali M. R. , Khoshdan N. , Hashemi O. R. , Seiyed Sajjadi S. A.
• Języki publikacji: EN

Abstrakty

EN

The complexation between the salts of protonated of pyridine, 2-methyl pyridine, 2,4-dimethyl pyridine and 2,4,6-trimethyl pyridine and macrocyclic ligands 18-crown-6, aza-18-crown-6 and 1,10-diaza-18-crown–6 have been studied conductometrically in acetonitrile at different temperature. Formation constants of the resulting 1:1 complexes were determined by the computer fitting of the molar conductance-mole ratio data. The stability of complexes decrease in the sequence: 1,10-diaza-18-crown-6 > aza-18- crown-6 > 18-crown-6. The enthalpy and entropy of complexation were determined from the temperature dependence of the formation constants. In all cases, the complexes were enthalpy stabilized, but entropy destabilized.

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2000
• Tom: Vol. 74, nr 10
• Strony: 1389--1398
• Opis fizyczny: Bibliogr. 43 poz., rys.

Twórcy

autor

Ganjali M. R.

autor

Khoshdan N.

autor

Hashemi O. R.

autor

Seiyed Sajjadi S. A.

• Department of Chemistry, Tehran University, Tehran, Iran