Synthesis and Structural Characterization of a New Tetranuclear Nickel(II) Sulfato Complex Containing the Anionic Form of Di-2-Pyridyl Ketone Oxime

Abstract

The preparation and crystal structure of a tetranuclear Ni(II) sulfato cluster containing the anion of di-2-pyridyl ketone oxime, (py) 2 CNO − , are reported. Treatment of NiSO 4 ·6H 2 O with one equivalent of (py) 2 CNOH and one equivalent of NEt 3 in MeOH leads to the compound [Ni 4 {(py) 2 CNO} 4 (SO 4 ) 2 (MeOH) 4 ] ( 1 ) in moderate yield. The metal ions are linked together by two 3.2111 and two 2.1110 (Harris notation) (py) 2 CNO − ligands, as well as two 2.1100 SO 4 2− ions to create a rare metallacrown-type (12-MC-4) ring. Strong H-bond intermolecular interactions in 1 lead to the formation of a 1D chain along the axis. Characteristic IR bands are discussed in terms of the known structure of 1 .