Crystal Structures, Mössbauer Spectra and Reactivity of Sn,^II Salicylideneimines

Abstract

Single-crystal X-ray diffraction studies have been carried out on the tetradentate Sn^II complex N,N′-(4,5-dimethyl-1,2-phenylene ) bis ( salicylideneiminato )tin(II) [ Sn ( saldph )] and the tetradentate complex N-(2-oxidophenyl) salicylideneiminatotin (II) [ Sn ( salop )]. Sn ( saldph ) is a monomer and has the Sn^II ion 1.126(1)Ǻ above the plane of the O₂N₂ donors while Sn ( salop ) is dimeric with bridging between Sn^II ions by the oxygens of the oxidophenyl groups. Sn^II ions are raised above the O₃N donor planes by 1.109(7)Ǻ while the molecules are bent along the bridging O-O axis with a dihedral angle between the chelate planes of 92.1°. The Mossbauer spectra of the complexes are reported. The Sn^II salicylideneimines react with H₂O and oxygen but are inert to alkyl halides.