Darstellung,spektroskopische Charakterisierung und Normalkoordinatenanalyse von Nonabromoditechnetat(IV), [Tc2Br9]− |
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Authors: | A Wendt W Preetz |
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Abstract: | Preparation, Spectroscopic Characterization and Normal Coordinate Analysis of Nonabromoditechnetate(IV), Tc2Br9]? . On heating the tetraethylammonium salt (TEA)2Tc2Br6] with trifluoroacetic acid the face-sharing bioctahedral anion Tc2Br9]? is formed, which vibronic spectrum is assigned according to point group D3h. Normal coordinate analysis, based on a general valence force field has been performed, resulting in a good agreement of calculated frequencies with the observed IR and Raman bands. Due to stronger bonding of the terminal as compared to the bridging ligands, the valence force constant fd(TcBrt) = 1.045 is significantly higher than fd(TcBrb) = 0.80 mdyn/Å. |
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Keywords: | Nonabromoditechnetate(IV) Synthesis Raman IR Spectra Normal Coordinate Analysis |
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