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|Type:||Artigo de periódico|
|Title:||Determination of electron paramagnetic resonance parameters for osmium(III) low-spin systems using graphical solutions|
|Abstract:||Optical absorption and electron paramagnetic resonance (EPR) results for the low-spin compounds [Os(NH3)(5)L][O3SCF3](n) [L = 4,4'-dithiodipyridine (dtdp) or H2O, n = 3; L = O3SCF3, n = 2] are reported. The EPR powder spectrum is analysed and from the three:experimental g values the crystal-held parameters and the energy levels are determined. The negative sign obtained for the axial splitting in [Os(NH3)(5)(dtdp)][O3SCF3] has been interpreted to be the result of an Os-III --> L back-bonding interaction. The IR optical spectrum shows a broad band at 2080 nm that is compared to the estimate obtained from the EPR results. Analytical expressions for the crystal-field parameters and energy levels of the system are derived. In addition, an alternative graphical method which simplifies the estimation of ligand-field parameters from the EPR parameters is presented.|
|Editor:||Royal Soc Chemistry|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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