The reactivity of areneseleninato complexes. New zinc (II) benzeneseleninato derivatives with 1,10-phenantroline as bidentate nitrogen donor ligand

Treatment of the O,O'-seleninatodiaquozinc(II) derivatives of the type [Zn(H2 O)2 (X-C6 H4 SeO2)2] (X=H, p-Cl, m-Cl, p-Br, m-Br, p-Me, p-NO2) with 1,10-phenanthroline produces 1 : 2 or 1 : 3 complexes, depending on the metal: o-phen stoichiometrical ratio. The 1 : 2 complexes were non-conducting and of the O-seleninato type, whereas the triscomplexes behaved as 1 : 2 electrolytes; the nitrogen donor ligand is always bidentate. The newly prepared complexes are characterized by far-I.R. and near-I.R. spectroscopy, as well as conductivity measurements. The possible stereochemistries of the complexes are discussed.