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1987 (1)
1Author    W. Preetz, H.N V AllwördenRequires cookie*
 Title    Darstellung und Schwingungsspektren von Chloro-Bromo-Ruthenaten(IV) einschließlich der Stereoisomeren Preparation and Vibrational Spectra of Chloro-Bromo-Ruthenates(IV) Including Stereoisomers  
 Abstract    The mixed chloro-bromo complexes [RuCl"Br 6 _"] 2_ , n = 1—5, have been separated for the first time by ion exchange chromatography on diethylaminoethylcellulose. Due to the stronger trans-effect of Br compared with Cl, on treatment of [RuBr 6 ] 2 ~ with Cl" in the presence of Br 2 nearly pure ciy//ac-isomers,andbyreactionof [RuCl 6 ] 2 " withBr"/Br 2 nearlypurerran5/mer-isomersforn = 2,3,4 are formed. The vibrational spectra of the mixed ligand complexes are completely assigned according to point groups D 4h , C 4v , C 3v and C 2v , respectively. The bands are observed in the characteristic regions: v(RuCl): 340-270 > v(RuBr): 245-190 > <3(ClRuCl): 170-140 > ö(ClRuBr) > <3(BrRuBr): 125—90 > v L : < 100 cm" 1 . The lower stability of the hexahalogeno complexes of Ru(IV), 4d, compared with the homologous complexes of Os(IV), 5d, is confirmed by a decrease of the force field constants by approximately 15%. 
  Reference    Z. Naturforsch. 42b, 381—386 (1987); eingegangen am 18. Dezember 1986 
  Published    1987 
  Keywords    Chloro-Bromo-Ruthenates(IV), Stereoisomers, r/wis-Effect, IR Spectra, Raman Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0381.pdf 
 Identifier    ZNB-1987-42b-0381 
 Volume    42