Iron(II) and Nickel(II) Complexes of 6-(Pyrazol-1-yl)-2,2' -bipyridine

Abstract

Iron(II) and nickel(II) complexes of 6-(pyrazol-1-yl)-2,2′-bipyridine (pzbpy) have been prepared and characterized by magnetic susceptibility measurements and electronic spectroscopy. The magnetic behaviour of the iron(II) complexes and the electronic spectra of the nickel(II) complex indicate that pzbpy is a relatively strong-field ligand though its field strength is not as high as that of 2,2′:6′,2″-terpyridine. Comparisons of the field strength of terimine and analogous ligands are presented.