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1999 (2)
1998 (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 
2Author    Andreas Voigt3, Ulrich Abramb, Reinhard Kirmse3Requires cookie*
 Title    Zur Existenz von [ReNCl4.nF,|]' (n = 1-3) Nitridorhenat(VI)-Gemischt- ligandkomplexen -Eine EPR-Untersuchung EPR Evidence of [ReNCl4_ "F J~ (n = 1-3) Nitridorhenate(VI) Mixed-Ligand Complexes  
 Abstract    The formation of mixed-ligand complexes of the type [RevlNCl4_"Fn]_ (n = 1 -3) during the reaction of [ReVINCl4]~ with [ra-(C4H9)4N]F, KF, and HF is reported. Evidence of the individual mixed-ligand compounds is given by their EPR spectral data. In frozen solutions a specific dependence of the EPR data on the composition of the coordination sphere could be detected. This is shown (i) by a nearly linear dependence of gy and A| Re on the Cl/F-content of the [ReVINCl4_"F"]-unit (additivity rules) and (ii) by well-resolved l9F hyperfine splittings. 
  Reference    Z. Naturforsch. 53b, 1183—1187 (1998); eingegangen am 9. Juni 1998 
  Published    1998 
  Keywords    Rhenium Complexes, Nitrido Complexes, Mixed-Ligand Complexes, EPR Data 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1183.pdf 
 Identifier    ZNB-1998-53b-1183 
 Volume    53 
3Author    Barbara Wenzel, Peter StrauchRequires cookie*
 Title    Synthesis, Structural and EPR Investigations on Bis(tetraphenylphosphonium)- bis(l,2-dithiosquarato)oxovanadate(IV), (Ph4P)2[VO(dtsq)2]  
 Abstract    The molecular structure and EPR studies of bis(tetraphenylphosphonium)bis(1,2-dithiosquarato)oxovanadate(IV) are reported. (Ph4P)2[VO(dtsq)2] crystallizes in the mono­ clinic spaceogroup P2,/n with the unit cell parameters a = 10,9820(2), b = 15,4620(3), c = 14,5050(3) Ä, ß = 95,700(8)°, Z = 2. The g and hyperfine coupling tensors Av obtained from the EPR spectra in liquid and frozen solution are used to characterize the properties of the molecular orbital containing the unpaired electron and are compared to those obtained from EHT-MO calculations. 
  Reference    Z. Naturforsch. 54b, 165—170 (1999); eingegangen am 18. September 1998 
  Published    1999 
  Keywords    Sulfur, Oxovanadate(IV), Synthesis, EPR Data, Crystal Structure 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0165.pdf 
 Identifier    ZNB-1999-54b-0165 
 Volume    54