Details

Autor(en) / Beteiligte

• Miranda, P
• Moraes, C.P.G
• Araujo, M.P.B.M
• Matos, J.R
• Isolani, P.C
• Vicentini, G
• Zinner, L.B

Titel

Lanthanide nitrate complexes with 1,3-dithiane-1-oxide (DTSO)

Ist Teil von

• Journal of alloys and compounds, 2002-10, Vol.344 (1), p.96-100

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2002

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Lanthanide nitrate complexes with 1,3-dithiane-1-oxide (DTSO) were synthesized by reaction of the hydrated lanthanide nitrates with DTSO in triethyl- ortho-formate. Complexometric analyses with EDTA and CHN microanalytical procedures are indicative of a general formula Ln(NO 3) 3·3DTSO, where Ln=Nd–Lu and Y. IR absorption spectra were interpreted in terms of DTSO and nitrate anion coordination through the oxygen atoms. Conductance measurements in acetonitrile solutions showed that the complexes behave as non-electrolytes. The parameters obtained from the absorption spectrum of the Nd(III) compound indicated weakly covalent metal–ligand bonds. The 5D 0→ 7F J (J=1,2,3) transitions for the emission spectrum of the Eu(III) compound were interpreted in terms of a C 3 v symmetry. X-ray powder patterns showed only one isomorphous series. Thermogravimetry results (under air, 50 ml min −1 and 10 °C min −1 heating rate) showed that one DTSO molecule and the nitrate ions are liberated at ca. 300 °C and the other ligands are decomposed in three events until 900 °C leaving lanthanide oxysulfates as residues.