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Crystal Structure, Vibrational Spectra and Normal Coordinate Analysis of trans-(Et

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Kristallstruktur, Schwingungsspektren und Normalkoordinatenanalyse von trans-(Et

4

N)[OsF

4

Cl

2

]

Crystal Structure, Vibrational Spectra and Normal Coordinate Analysis of trans-(Et

4

N)[OsF

4

Cl

2

]

B. Lorenzen und W. Preetz

Institut f¨ur Anorganische Chemie der Christian-Albrechts-Universit¨at, Olshausenstraße 40, D-24098 Kiel

Sonderdruckanforderungen an Prof. Dr. W. Preetz. Fax: +49 (0)431 880 1520.

E-mail: preetz@ac.uni-kiel.de

Z. Naturforsch.55 b,691–694 (2000); eingegangen am 2. Mai 2000 trans-Tetrafluorodichloroosmate(V), Normal Coordinate Analysis

By careful oxidation of trans-tetrafluorodichloroosmate(IV) with PbO2/trifluoroacetic acid in dichloromethane the corresponding osmium(V) complex anion trans-[OsF4Cl2] is for- med. The X-ray structure determination on a single crystal has been performed of trans- (Et4N)[OsF4Cl2] (triclinic, space group P¯1, a = 7.190(5), b = 7.205(5), c = 7.732(5) ˚A,= 71.28(1),= 71.32(1),= 70.76(1), Z = 1). Based on the molecular parameters of the X-ray determination the IR and Raman spectra of the complex have been assigned by normal coordi- nate analysis. The valence force constants are: fd(OsCl) = 2.13 and fd(OsF) = 3.81 mdyn/ ˚A.

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