Nickel(II) Salicylaldiminates: Re-Visiting a Classic

Abstract

A series of Ni(II) trinuclear complexes, [Ni<sub>3</sub>(sala-X)<sub>6</sub>] (sala-X = <i>o</i>-[(<i>p</i>-X-phenylimino)methyl]phenol; X = Br <b>1-Br</b>, Me <b>1-Me</b> and OMe <b>1-OMe</b>), have been prepared and fully characterised. X-ray crystallographic studies reveal that the complexes are composed of <a>three face-sharing octahedral Ni(II) metal ions bridged by the phenoxide oxygens of the sala-X ligands</a>. Magnetic studies indicate that the magnetic Ni(II) centres are ferromagnetically coupled with the substituent group having only a minor impact on the magnitude of coupling. DFT calculations also support ferromagnetic coupling with smaller Ni-O-Ni angles leading to slightly larger coupling constants in line with previous studies.