Studies on the intermolecular interactions of metal chelate complexesIX: On the interaction of copper(II) dithiocarbamate with some lewis acids

Abstract

The intermediate products of the reaction between copper(II) dithiocarbamate complex and some Lewis acids (HgI 2, HgBr 2, GeCl 4, AsBr 3, CoCl 2, C(NO 2) 4) as well as some organometallic compounds (SnEt 4 and PbEt 4) were studied using EPR spectroscopy. In non-polar and non-coordinating solvents HgI 2, HgBr 2 and GeCl 4 formed adducts with Cu(dtc) 2, whereas in polar and coordinating solvents the mixed-ligand complexes of the type Cu(dtc) +…A −(A = HgX 3) were obtained with a complex counterion in the second coordination sphere of copper(II). With C(NO 2) 4 the intermediate reaction product in non-polar solvents was assumed to be Cu(dtc)·NO 2 which dissociates to Cu(dtc) +…NO 2 − in polar solvents. Similar EPR spectra were obtained with SnEt 4 and PbEt 4. The reaction of Cu(dtc) 2 with CoCl 2, AsBr 3 and SbCl 3 yielded the mixed-ligand complexes of the type Cu(dtc)X n ( n = 1 or 2) exhibiting well resolved superhyperfine splitting from one or two halogen nuclei. The influence of the medium on the above interaction is also discussed.