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'Cyclophosphazenes' in keywords Facet   section ZfN Section B  [X]
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1994 (1)
1976 (1)
1Author    J.-P Faucher, J.-F Labarre, R. A. ShawRequires cookie*
 Title    Bonding in Cyclophosphazenes: Quantum and Experimental Support for DEWAR'S Island Model  
 Abstract    Quantum mechanical calculations for a number of cyclophosphazenes reveal that transannular bonding and antibonding interactions contribute considerably to the stability and conformation of these PN ring systems. Charge distributions are only in agreement with the island theory; the latter is confirmed by Faraday effect measurements. 
  Reference    (Z. Naturforsch. 31b, 677—679 [1976]; received July 27 1975) 
  Published    1976 
  Keywords    Transannular Bonding, Inorganic Ring Systems, CNDO/2 Calculation, Cyclophosphazenes, Dewar's Island Theory 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0677.pdf 
 Identifier    ZNB-1976-31b-0677 
 Volume    31 
2Author    G. Stalke, M. Eorge, SheldrickRequires cookie*
 Title    Neue Cyclophosphazene mit Metallen der III. Hauptgruppe als Ringbausteine  
 Abstract    Acylic silylated phosphazenes of the type HN(PR2NSiMe3)2 (1) react quantitatively with molecules MMe3 (M = Al, Ga, In) under ring formation and CH4 evolution. The ring com­ pounds N(PPh2NSiMe3)2AlMe2 (2 a) and N(PPh2NSiMe3)2InMe2 (4 a) have been investiga­ ted by X-ray structure determination. 2a and 4a crystallize in the space groups P 1 and P 3 15 respectively; they show different conformations regarding the cyclohexane framework. NMR spectroscopy of the nuclei in the chelating phosphazene ligand indicates decreasing Lewis acidity of the metal containing fragments in the series AlMe2 > GaMe2 > InMe2. 
  Reference    (Z. Naturforsch. 49b, 43—49 [1994]; eingegangen am 22. September 1993) 
  Published    1994 
  Keywords    Cyclophosphazenes, Chelating Ligands, Conformational Isomers, Lewis Acidity, 27Al NMR Spectra 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0043.pdf 
 Identifier    ZNB-1994-49b-0043 
 Volume    49