Resumen

DIAZ, C.. OBSERVATION OF STABLE 17 e IRON(III) CYCLOPENTADIENYL RADICAL COMPLEXES. Bol. Soc. Chil. Quím. [online]. 1999, vol.44, n.3, pp. 315-320. ISSN 0366-1644.  doi: 10.4067/S0366-16441999000300008.

The EPR spectra of a series of mononuclear complexes [ CpFe(dppe)SR] PF₆R = C₆H₅ (1), C₃H₇ (2),p-C₆H₄Br (3) and the binuclear [ CpFe(dppe)-S-CH₂CH₂-S-CpFe(dppe] (PF₆)₂ (4) were measured. All the paramagnetic complexes exhibit intense signals in both solid state as well as in CH₂Cl₂solution. Analysis of the spectra indicates a pseudooctahedral structurefor the complexes except for complex (2) for which a tetragonaldistortion in solid state was observed. Some degree of delocalization ofthe unpaired electron for (3) and (4) was suggested. The stabilization of the radicals by the thiolate ligands is discussed

Palabras clave : Iron-sulfur complexes; EPR; organometallicradical; thiolate compounds.