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Application of Fourier Transform mid- and far-IR spectroscopy for studies of oxo– derivatives of Ag(II)
|Przemyslaw Malinowski 1, Wojciech Grochala 1,2, Zoran Mazej 3|
1. Warsaw University, Faculty of Chemistry, Pasteura 1, Warszawa 02-093, Poland
Three metathetical (ligand exchange) reactions have been performed: (i) AgF2(s) + CF3SO3H(l), (ii) AgF2 + FSO3H(l), (iii) Ag(SbF6)2(dissolved in HF) + K2SO4(dissolved in HF). The solid products have been subject to combined thermogravimetric / calorimetric / evolved gas analysis involving infrared spectroscopy of evolved gases using Bruker’s Vertex 80V vacuum FT–IR spectrometer. All products decompose thermally in two distinct steps in the temperature range 80–400 oC yielding derivatives of Ag(I) and simultaneously evolving O2 and/or SO3, and peroxo dimers: (SO3F)2 or (SO3CF3)2 (in equilibrium with their corresponding radicals: SO3F, SO3CF3). Solid products of the metathetical reactions (i-iii) and solid products of their thermal decomposition have been studied with FT mid- and far-IR spectroscopy. Analyses performed indicate that reaction (i) leads to Ag(SO3CF3)2, reaction (ii) to an unidentified oxo- derivative, possibly Ag(SO3F)2, while reaction (iii) to either AgIISO4 or its electromeric peroxo form AgI2S2O8. Complete thermal decomposition of (i) leads to AgI(SO3CF3), that of (iii) to an unidentified product different from AgI(SO3F), while that of (iii) to AgI2SO4.
Presentation: Poster at E-MRS Fall Meeting 2008, Symposium J, by Przemyslaw Malinowski
See On-line Journal of E-MRS Fall Meeting 2008
Submitted: 2008-05-08 12:37 Revised: 2009-06-07 00:48