4th International Workshop on Positron and Positronium Chemistry

J. Phys. IV France 03 (1993) C4-147-C4-149
DOI: 10.1051/jp4:1993420

Equilibrium constants of the formation of 1,3,5-trinitro-benzene complexes and their reaction rate constants with o-Ps

B. LÉVAY

Department of Nuclear Chemistry, Eötvös Loránd University, P.O. Box 32, 1518 Budapest 112, Hungary

Abstract
Equilibrium constants of complex formation between the strong electron acceptor 1,3,5-trinitro-benzene (TNB) and basic donors (n-butyl-amine and piperidine) were determined by positron annihilation lifetime technique. The reaction rate costants of the complexes with o-Ps were calculated too. The results were compared with our earlier investigation on TNB in methanolic solutions of NaOH/1/. All the complexes formed were so called Meisenheimer complexes /2/. The stability of the complexes and their reactivity towards o-Ps can be accounted for by the differences in their structure, in the size of the donor molecules and in the charge distribution on the complexes.

© EDP Sciences 1993