Cooperative Effects in the Binding of Substrates to Nickel(II) and Nickel(III) Complexes with a Bis(macrocyclic) Ligand

✍ Scribed by Peter Comba; Yaroslaw D. Lampeka; Alexander Y. Nazarenko; Alexander I. Prikhod'ko; Hans Pritzkow; Joanna Taraszewska

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 258 KB
• Volume: 2002
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/1099-0682(200207)2002:7<1871::aid-ejic1871>3.0.co;2-f

✦ Synopsis

Nickel(II) complexes of mono-and bis(macrocyclic) ligands are the products of a nickel(II)-assisted template reaction with 2,3,2-tet, melamine and formaldehyde [2,3,2-tet = bis-N,NЈ-(2-aminoethyl)propane-1,3-diamine; melamine = 2,4,6-triamino-1,3,5-triazine]. The structures of two four-coordinate, diamagnetic nickel(II) complexes (protonated and non-protonated form) and of a six-coordinated paramagnetic nickel(II) compound with the protonated ligand have been determined by X-ray crystallography. Electronic spectroscopy was used to analyze the equilibrium between the paramagnetic and diamagnetic forms, and the electrochemical properties have been studied extensively (Ni