An unsymmetrical dinuclear scandium complex comprising salophen ligands [H 2salophen = N,N′-bis(salicylidene)-1,2-phenylenediamine]

Abstract

reatment of scandium nitrate tetrahydrate with the tetradentate ligand H2salo- phen [N,N0-bis(salicylidene)-1,2-phenylenediamine] afforded the yellow dinuc- lear complex Sc(NO3)2(my-salophen)Sc(salophen)(EtOH) or [Sc2(C20H14N2O2)2- (NO3)2(C2H6O)] (systematic name: (ethanol-kappaO)bis(nitrato-kappa2O,O0){my-2,20-[1,2-phenylenebis(nitrilomethanylylidene)]diphenolato-kappa4N,N0,O,O0:kappa2O,O0}{2,20-[1,2-phenylenebis(nitrilomethanylylidene)]diphenolato-kappa4O,N,N0,O0}discandium). In this compound, one salophen ligand displays a bridging coordination via the two oxygen atoms, while the other salophen ligand is attached to only one Sc center. This arrangement is stabilized by a hydrogen-bonded EtOH co-ligand, and by