Nickel(II) salicylaldiminates: Re-visiting a classic

Supaporn Saechio (1) , Rodolphe Clérac (2) , Keith S Murray (3) , Wasinee Phonsri (3) , Eliseo Ruiz (4) , Phimphaka Harding (1) , David J Harding (1)

1 Functional Materials and Nanotechnology Center of Excellence
2 CRPP - Centre de Recherche Paul Pascal
3 Monash University [Clayton]
4 IQTC - Institut de Recerca de Química Teorica i Computacional

A series of Ni(II) trinuclear complexes, [Ni 3 (sala-X) 6 ] (sala-X = o-[(p-X-phenylimino)methyl]phenol; X = Br 1-Br, Me 1-Me and OMe 1-OMe), have been prepared and fully characterised. X-ray crystallographic studies reveal that the complexes are composed of three face-sharing octahedral Ni(II) metal ions bridged by the phenoxide oxygens of the sala-X ligands. 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. AC susceptibility studies show no evidence of single-molecule magnet behaviour. DFT calculations also support ferromagnetic coupling with smaller Ni-O-Ni angles leading to slightly larger coupling constants in line with previous studies. ☆ We dedicate this paper to Professor R. H. Holm who passed away on 15th February 2021. Dick was a pioneer in modern inorganic and bioinorganic chemistry with early interests in d-block Schiff Base chemistry.

Mots clés: Nickel complexes; X-ray crystallography; Magnetic properties; DFT calculations

Domaines: Chimie de coordination; Cristallographie

Supaporn Saechio, Rodolphe Clérac, Keith S Murray, Wasinee Phonsri, Eliseo Ruiz, et al.. Nickel(II) salicylaldiminates: Re-visiting a classic. Polyhedron, 2021, 205, pp.115321. ⟨10.1016/j.poly.2021.115321⟩. ⟨hal-03267666⟩