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'7 Li NMR Spectra' in keywords
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1988 (1)
1981 (2)
1Author    Heinrich Nöth, Robert Rurländer, Peter WolfgardtRequires cookie*
 Title    Solutions of Lithium Tetrahydrido Aluminates in Ethers: a 'Li and 27 AI NMR Study  
 Abstract    Solutions of LiAlH4 in tetrahydrofuran (THF), glycoldimethylether (monoglyme), diglycoldimethylether (diglyme) and triglycoldimethylether (triglyme) as well as solutions of LiAlH4/THF in toluene have been investigated by 7 Li and 27 A1 NMR. It was found that <5 27 A1 is nearly independent of the solvent as is 1 J(A1H). However, the line width of the 27 A1 NMR signal shows strong solvent influences and, in addition, concentration and temperature dependence. Intermolecular hydride exchange becomes rapid in solutions of monoglyme and triglyme at room temperature. This can also be shown by the H/D exchange between LiAlH4 and L1AID4. <5 7 Li data indicate that Li is hexacoordinated in the series of glycoldimethylethers, and LiAlH4 in diglyme seems to be the system in which the AIH4 moiety is least affected by ion pair or triple ion formation. 
  Reference    (Z. Naturforsch. 36b, 31—41 [1981]; received July 28 1980) 
  Published    1981 
  Keywords    Lithium Tetrahydroaluminates, Lithium Tetradeuterioaluminates, 7 Li NMR Spectra, 27 A1 NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0031.pdf 
 Identifier    ZNB-1981-36b-0031 
 Volume    36 
2Author    Brigitte Sarry, Rolf SchaffernichtRequires cookie*
 Title    Übergangsmetallbenz -in-Komplexe. Dynamisches Verhalten von [Ta(C6H5)4(C6H4)a(Li * OC4H10)3] Transition Metal Benzyne Complexes. Fluxional Behaviour of [TAFCEHSMCEKIMLI * OC4HI0)3]  
 Abstract    Products of the reaction between MBrs and PhLi are proved to be benzyne complexes [M(C6H5)4(CeH4)2(Li-OC4Hio)n], (M = Nb, Ta, W). Analysis of the temperature dependent 1 H and 7 Li NMR Spectra of [TafCeHsMCeH^fLi • OCjHiob] are interpreted on the basis of square antiprismatic/dodecahedral structure with facial CeH4 groups. 
  Reference    Z. Naturforsch. 36b, 1238—1243 (1981); eingegangen am 30. April 1981 
  Published    1981 
  Keywords    Benzyne Transition Metal Complexes, X H NMR Spectra, 7 Li NMR Spectra, Fluxional Behaviour 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1238.pdf 
 Identifier    ZNB-1981-36b-1238 
 Volume    36 
3Author    St Böck, H. Nöth, P. RahmRequires cookie*
 Title    Lithium-dimethylamino-hydrido-aluminate: Lösungszustand in Diethylether, Tetrahydrofuran und Dimethyldiglykolether Lithium Dimethylamino Hydrido Aluminates: The Solution State in Diethylether, Tetrahydrofuran and Dimethyldiglycol Ether  
 Abstract    The reaction of LiAlH 4 with dimethylamine has been studied in THF, diglyme and diethyl ether solution covering the molar ratios 1:0.5 to 1:4. In all cases the stoichiometric amount of H : is evolved. With the exception of LiAl[N(CH 3) 2 ] 4 all other members of the series LiAlH 4 _"[N(CH 3) 2 ]" cannot be isolated. They are in equilibrium with one another in solution. These equilibria are independent of the solvent used. The structure of compound LiAl[N(CH 3) 2 ] 4 -2(OC 4 H 8) has been determined by X-ray diffrac-tion. The anion acts as a bidentate ligand to Li which is also bonded to the oxygen atoms of two THF molecules. 
  Reference    (Z. Naturforsch. 43b, 53—60 [1988]; eingegangen am 19. August 1987) 
  Published    1988 
  Keywords    Lithium Dimethylaminohydrido Aluminates, 27 A1 NMR Spectra, Solution State, X-Ray, 7 Li NMR Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0053.pdf 
 Identifier    ZNB-1988-43b-0053 
 Volume    43