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'Rhenium Complexes' in keywords Facet   Publication Year 1998  [X]
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1998[X]
1Author    Nicolai Burzlaff, Michael Hagel, WolfdieterA. SchenkRequires cookie*
 Title    Tuning the Steric and Electronic Properties of Chiral Rhenium Thiolate Complexes [1]  
 Abstract    Reaction of the complex [CpRe(NO)(CO)2]BF4 with triisopropylphosphine gives the chiral CO substitution product [CpRe(NO){P(/-Pr)3}(CO)]BF4. The corresponding triphenylphos-phite complex [CpRe(NO){P(OPh)3}(CO)]BF4 may be obtained by oxidative CO removal. Reduction of the remaining CO ligand with NaBH4 furnishes the corresponding methyl com­ plexes [CpRe(NO)(L)(CH3)]. The structure of [CpRe(NO){P(/-Pr)3}(CH3)] was determined: triclinic space group PI (No. 2), a = 8.442(4), b = 9.582(5), c -11.820(8) A, a = 81.81 (4), ß = 87.18(4), 7 = 63.87(5)°, Z = 2. Reaction of the methyl complexes with HBF4 in the presence of thiols gives, after chromatographic workup, the thiolate derivatives [CpRe(NO)(L)(SR)] (L = CO, P(OPh)3, P(/-Pr)3, R = CH2Ph, CH2(4-C6H4C1), CH2(4-C6H4OMe), CH3, C2H5). The structure of [CpRe(NO){P(/-Pr)3}(SCH3)] was determined: monoclinic space group P2i (No. 3), a = 7.0515(7), b = 17.3469(10), c = 7.9727(7) Ä, ß = 114.021(7)°, Z = 2. In both structures, a significant opening of the angle N-Re-X (X = C, S) suggests that antibonding interactions between orbitals of the ligand X and the second-highest MO of the [CpRe(NO)(L)] complex fragment are avoided. 
  Reference    Z. Naturforsch. 53b, 893—899 (1998); received May 5 1998 
  Published    1998 
  Keywords    Rhenium Complexes, Thiolate Ligands, Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0893.pdf 
 Identifier    ZNB-1998-53b-0893 
 Volume    53 
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