CEQUINOR   05415
CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Unidad Ejecutora - UE
artículos
Título:
“Synthesis, crystal structure, infrared and Raman spectra and thermal behaviour of polymeric [Cu(SO3(CH2)3S-S(CH2)3SO3)(H2O)4]n. , Sol.State Sci. 9, 862-868 (20
Autor/es:
M.A. PASQUALE, A.E. BOLZÁN, J.A. GUIDA, R.C.V. PIATTI, A. J. ARVIA, O.E. PIRO Y E.E. CASTELLANO
Revista:
SOLID STATE SCIENCES
Editorial:
Elsevier
Referencias:
Año: 2007 vol. 9 p. 862 - 862
ISSN:
1293-2558
Resumen:
The formation and characterisation of a polymeric copper complexproduced by chemical reaction between copper (II) ions and 3-mercapto-1-propanesulphonate sodium salt (MPSA) were studied. The formation of this complex,followed by sequential UV-visible spectroscopy measurements involves thereduction of Cu(II) ions to Cu(I) by MPSA, the latter being oxidised to bis-(3-sulphopropyl)-disulphide (SPS), a dimer of MPSA. In the presence of oxygen, there-oxidation of Cu(I) to Cu(II) results in the formation of polymeric complexspecies consisting of [Cu(SO3(CH2)3SS(CH2)3SO3)(H2O)4] units. Single crystal X-ray diffraction shows that thispolymeric copper complex crystallizes in the monoclinic C2/c space group. TheCu(II) ion in the complex structure lies on an inversion centre in an elongatedoctahedral environment, equatorially coordinated to four water molecules andaxially to two MPSA ligands through one of their sulphonic oxygen atoms. Thecomplex units arearranged in the lattice as polymeric [Cu(SPS)(H2O)4]n molecules extending alongthe crystal [101] direction. The IR and Raman spectra as well as TGA and DTAdata are reported. The stepwise thermal decomposition from room temperature upto 1000C begins with the loss of water molecules and ends with the formation ofcopper sulphide species.