Synthesis and Structural Characterization of Furan-2,5-dicarbonylbis(N,N-diethylthiourea) and its Dinuclear Cu(II) and Zn(II) Complexes

The condensation reaction of furan-2,5-dicarbonyl dichloride and N,N-diethylthiourea gave rise to furan-2,5-dicarbonylbis(N,N-diethylthiourea), H2L. Chemical composition and structural features of H2L were studied by spectroscopic methods as well as single crystal X-ray diffraction. H2L readily reacted with equimolar amount of CuCl2∙2H2O or ZnCl2 in MeOH with the presence of the supporting base Et3N. Such reactions resulted in metal complexes, which were characterized by spectroscopic studies. The results indicated dinuclear neutral compounds [M2(L)2] (M = Cu(II) or Zn(II)), in which H2L was doubly deprotonated and the resulting {L2–} anion bonded to metal ions through (S,O)-donor sets of the aroylthiourea moieties.