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'Cyclotriphosphanes' in keywords
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1977 (1)
1976 (1)
1Author    Marianne Baudler, Burkhard Carlsohn, Wolfgang Böhm, Goswin ReuschenbachRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 62 1 Zur Frage des 31 P-kernresonanzspektroskopischen Nachweises von monomerem und dimerem Phenylphosphor und der Ringgröße von Organyl-cyclophosphanen Contributions to the Chemistry of Phosphorus, 62 1 About the Question of 31 P NMR Spectroscopic Detection of Monomeric and Dimeric Phenyl Phosphorus and the Ring Size of Organylcyclophosphanes  
 Abstract    The weak resonances at + 22 and + 49 ppm appearing in the 31 P NMR spectrum of melts or solutions of (PPh)5 that have been attributed previously in the literature to "dimeric" and "monomeric phenylphosphorus" are caused by (PPh)6 and (PPh)4, respectively. This was proved by comparison with the 31 P NMR parameters of related compounds and by 31 P NMR spectroscopic investigation of authentic samples of (PPh)6 and (PPh)4, the latter of which was prepared in high yield from (Me3Si)PhP-PPh-PPh(SiMe3) and PhPCl2-(PEt)4 and mixed-substituted phenyl-ethyl-cyclotetraphosphanes exhibit 
  Reference    (Z. Naturforsch. 31b, 558—564 [1976]; eingegangen am 16. Januar 1976) 
  Published    1976 
  Keywords    Cyclohexaphosphanes, Cyclopentaphosphanes, Cyclotetraphosphanes, Cyclotriphosphanes, Phosphinidene 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0558.pdf 
 Identifier    ZNB-1976-31b-0558 
 Volume    31 
2Author    Marianne Baudler, Christian Pinner, Christian Grüner, Jochen Hellmann, Michael Schwamborn, Bernhard KlothRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 761 Tricyclohexyl-cyclotriphosphan, Pentacyclohexyl-cyclopentaphosphan und 1.2.3.4-Tetracyclohexyl-cyclo-5-carba-1.2.3.4-tetraphosphan  
 Abstract    Tricyclohexyl-cyclotriphosphane, (c-C6HnP)3 (1), is another relatively stable compound with a three membered phosphorus ring. It is produced in the reactions of (a) K2(c-C6HuP)4 with CH2CI2, (b) K2(c-C6HhP)4 with CS2, (c) C-C6H11PCI2 with sodium in dioxane. The following by-products are formed: (c-C6HhP)4CH2 (3), (c-CßHnP^ (2) and (c-C6H n P )4 in the reaction (a); mainly (c-CeHuP)4 in the reaction (b); (c-CeHnPjs (2) and (c-CeHnP)4 in the reaction (c). The P3 ring compound 1 and the P5 ring compound 2 can be isolated in a pure state. The oligomers (c-CeHnP)n, n —3, 4, 5, clearly are distinguished by the melting points, the molecular masses and by the 31P NMR and vibrational spectra. The 31P NMR parameters of 3 are reported. The cyclohexyl groups in 1, 2 and 3 are situated on both sides of the corresponding ring systems, giving rise to a maximum number of “trans” orientated neighboring substituents. 
  Reference    (Z. Naturforsch. 32b, 1244—1251 [1977]; eingegangen am 18. Juli 1977) 
  Published    1977 
  Keywords    Cyclotriphosphanes, Triphosphiranes, Tricyclohexyl-cyclotriphosphane, Cyclopentaphosphanes, Cyclocarbaphosphanes 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-1244.pdf 
 Identifier    ZNB-1977-32b-1244 
 Volume    32