Some studies on thallium oxalates: XIV. Indium(III) bis-oxalatodiaquathallate(III) hexahydrate

• Published in: Thermochimica acta Vol. 381; no. 1; pp. 31 - 36
• Main Authors: Kebede, Tesfahun, Ramana, Karri V., Prasada Rao, M.S.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 03.01.2002; Elsevier Science
• Subjects: Bis-oxalates; Chemistry; Coordination compounds; Exact sciences and technology; Indium(III) salt; Inorganic chemistry and origins of life; IR data; Preparations and properties; Thallium(III); Thermal analysis; X-ray diffraction; X-ray diffraction; Thallium(III); Indium(III) salt; Thermal analysis; Bis-oxalates; IR data; Thallium Complexes; Oxalate; Thermogravimetry; Organic ligand; Differential thermal analysis; Trivalent metal Complexes; X ray diffraction; Thermal stability; Infrared spectrometry; Indium Complexes; Group IIIA metal Complexes; Aqua complex; Heteronuclear complex
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/S0040-6031(01)00641-4

Thallium(III) was precipitated with oxalic acid in the presence of 0.01 M In(NO 3) 3 in 0.125 M HNO 3. Chemical analysis of the solid obtained corresponds to the formula In[Tl(C 2O 4) 2] 3·12H 2O. Thermal studies (TG, DTG and DTA) indicated the dehydration and redox decomposition of the thallic salt to the thallous salt and finally to a mixture of indium(III) and thallium(III) oxides. The latter, however, volatilised leaving indium(III) oxide as residue. Infrared absorption spectra and X-ray diffraction data were used to characterise the original salt, as well as the intermediate formed during its thermal decomposition. On the basis of these results, the compound may be represented as In 3+[Tl(C 2O 4) 2(H 2O) 2] 3·6H 2O.