Synthesis, structure, and electrochemical properties of N,Nʹ-bis(ferrocenylmethylene)ethylenediamine Schiff base and its metal complexes

The reaction of N,N'-bis(ferrocenylmethylene)ethylenediamine (FcNN) Schiff base with metal salts gave SnCl₄FcNN (1), SnCl₂FcNN(H₂O)₂ (2), Sn₂(CH₃)₄Cl₄FcNN (3), Ti₂Cl₈FcNN (4), CdFcNN(NO₃)₂ (5), and CuFcNN(NO₃)₂ (6). New complexes (1)–(6) were characterized by IR and elemental analysis techniques. IR spectra showed that the Schiff base was coordinated to the metal ions in a bidentate manner with N,N' donor sites. The ¹H NMR spectra of complexes (1), (2), and (4) show all the expected signals with a typical signal pattern of disubstituted ferrocenyl groups. The electrochemical properties of complexes were determined by cyclic voltammetry. Cyclic voltammetry results show that these complexes exhibit one irreversible oxidation peak.