The coordinating behavior of N,N '-bis(1-ethoxycarbonylethyl)ethanedithioamide towards Pd(II), Pt(II), and Cu(II)

The coordinating behaviour of N,N'-bis(1-ethoxy-carbonylethyl)ethanedithioa mide (H2L) was studied by preparing and characterising the complexes of the types [M(HL)(2)], [M(H2L)(2)]Cl-2 (M = Pd(II) and Pt(II)) and [Cu-2(L)X-2] (X = Cl and Br). Their structures were studied employing C-13 NMR, EPR, IR and UV-VIS spectral methods. In the [M(HL)(2)] and [M(H2L)(2)]Cl-2 complex es the ligand acts as a bidentate and coordinates through sulfur, giving a square-planar MS4 surrounding, whereas in the [CU2(L)X-2] complexes the lig and acts as a bis(tridentate) with N, S, O-cordination to two copper(II) io ns. The electronic and EPR spectra of the [Cu-2(L)X-2] complexes indicate a distorted square-planar symmetry around the Cu(II) ions.