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1999 (1)
1994 (1)
1Author    Z. NaturforschRequires cookie*
 Title    Lanthanoiden-Komplexe, IX [1]  
 Abstract    Reaktivitätsbestimmender Einfluß der Ligandenkonstitution bei Seltenerdamiden: Herstellung und Struktur sterisch überladener Alkoxid-Komplexe L anthanoid Com plexes, IX [1] Reactivity C ontrol o f L an th an o id A m ides through Ligand Effects: Synthesis and S tructures of Sterically C ongested Alkoxy Com plexes W olfgang A. H errm an n * , R ein er A nw ander, Florian C. M unck, W olfgang Scherer, V eronique D u fau d 3, N o rb ert W. H u b e rb, G eorg R. J. A rtus It is shown that the introduction o f sterically demanding ligands in lanthanoid metal com ­ plexes can depend more on the precise composition of the lanthanoid precursor than on the size of the new ligand. Thus, tris(r-butyl)methanol ("tritox-H ") does not react with the amides Ln[N(SiM e3) 2 ] 3 of the "late" (small) lanthanoid metals. However, fast and clean reactions occur with the sterically less demanding derivatives Ln[N(SiHM e2)2]3, with new homoleptic com plexes Ln(tritox)3 (Ln = Y, Nd) being formed with practically all metals o f this group of elements. The molecular and crystal structures of some lanthanoid amides and alkoxides are described. 
  Reference    Z. Naturforsch. 49b, 1789—1797 (1994); eingegangen am 30. März 1994 
  Published    1994 
  Keywords    Lanthanoid Complexes, Alkoxides, Amides, Synthesis, Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1789.pdf 
 Identifier    ZNB-1994-49b-1789 
 Volume    49 
2Author    Cornelia Borgmann, Christian Limberg, Läszlö Zsolnai, Katja HeinzeRequires cookie*
 Title    Syntheses, Structures, and Spectroscopic Properties of Alkoxide, Hydroxide, and Siloxide Complexes with (r73-Allyl)Mo Moieties  
 Abstract    Salts with binuclear anions of the general formula [(?73-C3H4R)(CO)2Mo(^-OR')2(/i-OR")-Mo(CO)2(f?3-C3H4R) r (R = h , R',R" = Me, 2 ; R = CH3, R' = CH(CH3)2, R" = OH, 3; R = CH3, R' = OH, R" = OSiMe3, 4) have been synthesised via reaction of [(r/3-C3H4R)-Mo(CO)2(CH3CN)2(thf)]+BF4_ , 1, with NaOMe, NaO'Pr, and KOSiMe3. All products were characterised spectroscopically and investigated by single crystal X-ray analysis. In the case of 3 low temperature 2D-NMR spectra revealed that the solid state structure is maintained in solution and that the compound shows a trigonal twist-rearrangement at room temperature. 
  Reference    Z. Naturforsch. 54b, 473—481 (1999); received October 28 1998 
  Published    1999 
  Keywords    Molybdenum Complexes, Allyl, Alkoxides, Hydroxides, NMR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0473.pdf 
 Identifier    ZNB-1999-54b-0473 
 Volume    54