Abstract

GRAUDO, José Eugênio J. C.; FILGUEIRAS, Carlos A. L.; MARQUES-NETTO, Antonio  and  BATISTA, Alzir A.. Electrochemical and positron annihilation studies of semicarbazones and thiosemicarbazones derived from ferrocene. J. Braz. Chem. Soc. [online]. 2000, vol.11, n.3, pp. 237-240. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532000000300006.

A series of six ferrocene derivatives containing a semicarbazone or thiosemicarbazone side chain was investigated by cyclic voltammetry and positron annihilation lifetime measurements. Both the redox and the electron capture processes took place on the Fe atom. Correlations between the two methods were proposed, taking into account the substituents on the side chain of the compounds, their redox potentials and the probabilities of o-positronium (o-Ps).formation.

Keywords : semicarbazone; thiosemicarbazone; ferrocene; cyclic voltammetry; positronium formation.