Thio-azo proligands based on 5,6-derivatives-1,10-phenanthroline and their use for iron(II) complexes: Synthesis, characterization and crystal structures
; 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
Journal Impact Factor: 1,801 (in 2008)
Digital Object Identifier:
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.