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'Halogenohexaborates' in keywords
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1999 (1)
1Author    M. Atthias, W. Anner1, W. Olfgang, K. Aim, Volker Lorenzenb, W. Ilhelm, P. ReetzRequires cookie*
 Title    Hexaborate Cluster Radical Anions [B6Haln Hal'^« ]*" and [B6Hal5R]*_ (Hai, Hai' = CI, Br, I; R = H, alkyl). Chemical or Electrochemical Generation, Vibrational, UV-Vis and EPR Spectroscopy  
 Abstract    Paramagnetic hexaborate clusters with mixed halide, halide/alkyl or halide/hydride substi­ tution were prepared from oxidizable dianionic precursors and were characterized by cyclic voltammetry, EPR, vibrational and UV-VIS spectroscopy. The EPR studies reveal increasing g anisotropy and EPR linewidths on replacing Cl by Br and especially by I substituents; on the other hand, the replacement of one halide by one alkyl (CH3 or CFFCN) or hydride substituent in [BftHalsR]*-causes decreasing radical persistence and g anisotropy. These results indicate a fairly uniform participation of the cluster core and the substituent sphere in the spin distribution as a major factor for the stability of these non-7r radicals. 
  Reference    Z. Naturforsch. 54b, 1103—1108 (1999); received June 2 1999 
  Published    1999 
  Keywords    EPR Data, Halogenohexaborates, Radical Anions, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1103.pdf 
 Identifier    ZNB-1999-54b-1103 
 Volume    54