Structural studies of copper(II) complexes derived from di-2-pyridyl-ketone, (py)2CO

Article abstract of DOI:10.1016/j.poly.2012.08.009

Reaction of ArSNC(py)₂ [Ar = 2,4-dinitrophenyl, (O ₂N)₂C₆H₃] with CuCl ₂·2H₂O in DMF yielded the tetranuclear complex [Me₂NH₂][Cu₄Cl₆{py ₂CO₂}{py₂C(OH)O}] (1) through metal-catalysed hydrolysis of both DMF and the thiazyl chain. Notably direct reaction of dipyridylketone (py₂CO) with CuCl₂·2H₂O in DMF yielded the mononuclear pseudo-octahedral complex [CuCl ₂(py₂C(OH)₂)(DMF)]·DMF (2) in which the 1,1-gem diol, py₂C(OH)₂ acts as a tripodal ligand. Heating of 2 in DMF/MeOH promoted aggregation and formation of the polymer [Cu ₂Cl₃{py₂(OMe)O}]_∞ (3). The structures of 1-3 were determined by X-ray diffraction.