The reaction of copper chloride dihydrate and ferric chloride hexahydrate with a tripodal N-4 ligand (ntb) under mild conditions affords two novel complexes [Cu(ntb)Cl](2)[CuCl4] (.) 2H(2)O (1) and [Fe(ntb)Cl-2]Cl (.) 3H(2)O (2). The reaction of ferric chloride with another N-4 ligand, bispicpn, forms an octahedral mononuclear complex, [Fe(bispicpn)Cl-2]Cl (3). Single-crystal X-ray structural Studies of 1, 2 and 3 reveal the formation of hydrogen-bond sustained 3D, 2D and 1D networks, respectively, involving (N-(HO)-O-...) and (N-(HCl)-Cl-...) interactions. The packing arrangement in 2 further reveals the existence of hexagonal channels with helical propagation along the diagonal of the crystallographic b- and c-axes. The reactions of these complexes with 3,5-di-tert-butyl-catechol have been studied in dimethylformamide. NMR techniques have been used to identify the reaction products.
|Titolo:||Synthesis and X-ray crystallographic characterization of copper and iron complexes with tetradentate-N-4 ligands: Reactivity towards catechol oxidation|
|Autori interni:||MANASSERO, MARIO|
|Parole Chiave:||iron and copper complexes ; hydrogen-bonded networks ; hexagonal pores ; oxidizing activity|
|Settore Scientifico Disciplinare:||Settore CHIM/03 - Chimica Generale e Inorganica|
|Data di pubblicazione:||8-dic-2005|
|Digital Object Identifier (DOI):||10.1016/j.poly.2005.06.020|
|Appare nelle tipologie:||01 - Articolo su periodico|