Resumo

DIAZ, C.  e  VALENZUELA, M.L.. Dendrimers based on cyclophosphazene unit and containing iron (III). Bol. Soc. Chil. Quím. [online]. 2000, vol.45, n.4, pp.527-533. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442000000400003.

The complexes [N₃P₃(OC₆H₅)₅OC₆H₄CH₂CN.FeCl₂]PF₆ (1) and [N₃P₃(OC₆H₄CH₂CN)₆. (FeCl₂)₆](PF₆)₆ (2) have been syntethyzed by reaction of the corresponding cyclophosphazene ligands: N₃P₃(OC₆H₅)₅OC₆H₄CH₂CN (3) and N3P3(OC6H4CH2CN)6 (4) with FeCl₃ in CH₃OH as solvent and in presence of NH₄PF₆. The new compounds were characterized by elemental analysis and IR, UV-Visible and EPR spectroscopy as well as electrochemical methods. The hexametalladendrimers exhibits a six-electron reduction while that the monometalladendrimers exhibit a single one-electron reduction. The paramagnetic complexes exhibit strong EPR signals in solid as well as in CH₂Cl₂ solution.

Palavras-chave : Dendrimers; cyclophosphazene; iron; nitrile complexes.