Otro
Synthesis, characterization, and thermal behavior of palladium(II) complexes containing 4-iodopyrazole
Registro en:
Journal Of Thermal Analysis And Calorimetry. Dordrecht: Springer, v. 117, n. 3, p. 1327-1334, 2014.
1388-6150
10.1007/s10973-014-3925-x
WOS:000340683300038
Autor
Silva, Cristiana da
Silva, Denis A. M. da
Rocha, Fillipe V.
Barra, Carolina V.
Frem, Regina Célia Galvão
Netto, Adelino Vieira de Godoy
Mauro, Antonio Eduardo
Almeida, Eduardo T. de
Resumen
The mononuclear pyrazolyl complexes [PdCl2(HIPz)(2)] (1), [PdBr2(HIPz)(2)] (2), [PdI2(HIPz)(2)] (3), [Pd(SCN)(2)(HIPz)(2)] (4), and [Pd(NHCOIPz)(2)] (5) have been prepared. Compound 1 was obtained from the displacement of acetonitrile from [PdCl2(CH3CN)(2)] precursor by the 4-iodopyrazole (HIPz) ligand, whereas 2-5 were synthesized by substitution of the chlorido in 1 by the respective anionic group. The compounds were characterized by elemental analysis, infrared spectroscopy, and H-1 NMR spectroscopy. The thermal behavior of 1-5 has been studied by TG and DTA. The thermal stability of [PdX2(HIPz)(2)] compounds varies according to the trends X = Cl- < I- a parts per thousand... SCN-< Br-. No stable intermediates were isolated during the thermal decompositions due to the overlap of the degradation processes. The final products of the thermal decompositions were characterized as metallic palladium by X-ray powder diffraction. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)