The dithioester (CH2)4NCS2CH3 (PyDTM, 1-pyrrolidinecarbodithioate methyl ester) has been prepared by reaction of the parent ammonium salt NH4PyDT (PyDT=(CH2)4NCS2 with methyl iodide in water/ethanol. The reaction of PyDTM with PdCl2 allowed to synthesize either (PdCl2(PyDTM)), in which the ligand is chelated by both sulfur atoms, or(PdCl2(PyDTM)2), in which the ligand acts as monodentate through the thiocarbonyl sulfur. Thermal degradation of(PdCl2(PyDTM)), yielded the (PdCl2(PyDTM))n species as an intermediate, which, in the presence of donors as chloride ions or dimethyl sulfoxide (DMSO), gave the complexes [PdCl(PyDT)(DMSO)] and NR4(PdCl2(PyDT)). Moreover, PyDTM was found to react with various [PdCl(dithiocarbamato)]n intermediates to form the mixed species [PdCl(dithiocarbamato)(PyDTM)], whose thermal degradation yielded the [Pd(dithiocarbamato)(PyDT)] complexes. The behaviour of the prepared compounds in either solution or solid phase has been described on the basis of IR and proton NMR spectra and thermogravimetric analysis (TG and DTA).
Pyrrolidine dithiocarbamates of Pd(II)
Sitran S;
2005
Abstract
The dithioester (CH2)4NCS2CH3 (PyDTM, 1-pyrrolidinecarbodithioate methyl ester) has been prepared by reaction of the parent ammonium salt NH4PyDT (PyDT=(CH2)4NCS2 with methyl iodide in water/ethanol. The reaction of PyDTM with PdCl2 allowed to synthesize either (PdCl2(PyDTM)), in which the ligand is chelated by both sulfur atoms, or(PdCl2(PyDTM)2), in which the ligand acts as monodentate through the thiocarbonyl sulfur. Thermal degradation of(PdCl2(PyDTM)), yielded the (PdCl2(PyDTM))n species as an intermediate, which, in the presence of donors as chloride ions or dimethyl sulfoxide (DMSO), gave the complexes [PdCl(PyDT)(DMSO)] and NR4(PdCl2(PyDT)). Moreover, PyDTM was found to react with various [PdCl(dithiocarbamato)]n intermediates to form the mixed species [PdCl(dithiocarbamato)(PyDTM)], whose thermal degradation yielded the [Pd(dithiocarbamato)(PyDT)] complexes. The behaviour of the prepared compounds in either solution or solid phase has been described on the basis of IR and proton NMR spectra and thermogravimetric analysis (TG and DTA).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
