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1992 (1)
1Author    Thom As, K. Aukorat, PeterG. Jones, Reinhard SchmutzlerRequires cookie*
 Title    Das 7,8-Benzo-5-chloro-1,4,4-trimethyl-l-aza-4-azonia-6,9-dioxa-5 A5-phospha- spiro[4.4]nonanyl-Kation: Röntgenstrukturanalyse und temperaturabhängige ^ -N M R -Spektren4]nonanyl Cation: X-Ray Crystal Structure Determination and Variable 'H NMR Spectra  
 Abstract    The 7,8-Benzo-5-chloro-1,4,4-trimethyl-1 -aza-4-azonia-6,9-dioxa-5/l5-phosphaspiro[4. The 'H N M R spectrum o f the spirophosphorane 3 at room temperature indicates dynamic behaviour o f the cation. The low-temperature 'H N M R spectra o f 3 exhibit two sets o f dou­ blets for the protons o f the diastereotopic N (C H 3)2 groups. The free enthalpy o f activation for the dynamic process was determined (58.6 KJ/mole). In the reaction o f 3 with sodium tetra-phenylborate the crystalline com pound, 4, involving the non-coordinating anion, [B(C6H 5)4]~, was obtained. The X-ray crystal structure analysis o f 4 reveals the presence o f a five-membered ring, formally as a result o f intramolecular donor-acceptor interaction between the nitrogen atom o f the N (C H 3)2 group and phosphorus. The geometry at phosphorus deviates som ewhat from ideal trigonal bipyramidal. 
  Reference    Z. Naturforsch. 47b, 755 (1992); eingegangen am 9. September 1991 
  Published    1992 
  Keywords    N, N', N'-Trim ethylethylenediam ine, A zonium Salt, Donor-Acceptor-Interaction, Temperature-Dependent N M R Spectra, X-Ray Crystal Structure 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0755.pdf 
 Identifier    ZNB-1992-47b-0755 
 Volume    47