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Thio-azo proligands based on 5,6-derivatives-1,10-phenanthroline and their use for iron(II) complexes: Synthesis, characterization and crystal structures

Rabaça, S. ; Duarte, M ; Pereira, L. ; Fourmigué, M. ; Henriques, R. T. ; Almeida, M.

Polyhedron Vol. 27, Nº 8, pp. 1999 - 2006, June, 2008.

ISSN (print): 0277-5387
ISSN (online):

Journal Impact Factor: 1,801 (in 2008)

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The preparation and characterization of 5,6-substituted-1,10-phenanthrolines, phdtos = 5,6-bistosyl-1,10-phenanthroline (1) and phdbt = 5,6-dibenzyltiol-1,10-phenanthroline (2) are described. The synthesis of (1) was achieved in good yield via the corresponding dihydroxide and 2 was obtained by cross-coupling reaction of 5,6-dibromo-1,10-phenanthroline and benzylthiol mediated by a palladium catalytic system in refluxing toluene (120 degrees C). These phenanthroline derivatives were used as ligands to afford [Fe-II(phdtos)(3)](PF6)(2) (5) and [Fe-II(phdbt)(3)](PF6)(2) (6) complexes.