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'Cyclocarbaphosphanes' in keywords
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1978 (2)
1977 (1)
1Author    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 
2Author    Marianne Baudler, Franz SaykowskiRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 85 [1, 2] Synthese und Eigenschaften der Diphosphirane (f-BuP)2CMe2 und (£-BuP)2CH2 Contributions to the Chemistry of Phosphorus, 85 [1, 2] Synthesis and Properties of the Diphosphiranes (£-BuP)2CMe2 and (£-BuP)2CH2  
 Abstract    The first three-membered P2C heterocycles, l,2-di-Zer£-butyl-3,3-dimethyl-diphos-phirane, (M3uP)2CMe2 (1), and l,2-di-£er£-butyl-diphosphirane, (Z-BuP)2CH2 (2), were synthesized by [2 + 1] cyclocondensation reactions of K(i-Bu)P-P(<-Bu)K with 2,2-di-chloropropane and dichloromethane, respectively. Both compounds could be isolated in a pure state by vacuum distillation. Whereas 1 is surprisingly stable under inert condi-tions, 2 dimerizes already at room temperature to form the six-membered cyclocarba-phosphane l,2,4,5-tetra-£er^butyl-cyclo-3,6-dicarba-l,2,4,5-tetraphosphane, (£-BUP)4(CH2)2 (3). The diphosphiranes 1 and 2 were characterized by elemental analysis, osmometric molecular mass determination, mass, NMR, and IR spectra. The <-butyl groups are situated on opposite sides of the P2C ring, whereas the dimeric compound 3 possesses an "all-trans'' configuration of the organyl substituents. 
  Reference    Z. Naturforsch. 33b, 1208—1213 (1978); eingegangen am 24. Juli 1978 
  Published    1978 
  Keywords    Diphosphiranes, Diphosphacyclopropanes, P2C-Heterocycles, Cyclocarbaphosphanes, Heterocyclophosphanes 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1208.pdf 
 Identifier    ZNB-1978-33b-1208 
 Volume    33 
3Author    Marianne Baudler, Elmar TollsRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 84 [1] 1.2.3-Trimethyl  
 Abstract    The reaction of K2(PMe)4 • 2 THF with eis-1,2-dichloroethylene yields the hitherto unknown cyclocarbaphosphanes 1,2,3-trimethyl-1,2,3-triphosphole, (PMe)3C2H2 (1), and 2,3,4,6,7,8-hexamethyl-2,3,4,6,7,8-hexaphosphabicyclo[3,3,0]octane, (PMe)6C2H2 (2). Besides, (PMe)s, (PMe)4CH2, (PMe)3C2Hi, and the new six-membered heterocycle (PMe)2(C2H2)2 are formed. The cyclocarbaphosphanes 1 and 2 were characterized by elemental analysis, mass, IR, Raman, and NMR spectra. For the bicyclic compound 2 two diastereomers were obtained and separated. They differ in the position of the methine hydrogens and of the methyl substituents (eis-2 and trans-2). Compound 2 is also produced in the reaction of K2(PMe)4 • 2 THF with £rans-l,2-dichloroethylene whereas with 1,1,2,2- tetrachloroethane mainly (PMe)s is formed. In 1 and in each of thefive-memberedrings of cis-2 and trans-2 the methyl substituents at adjacent phosphorus atoms are situated on opposite sides of the ring. 
  Reference    Z. Naturforsch. 33b, 691—697 (1978); eingegangen am 24. April 1978 
  Published    1978 
  Keywords    3-Trimethyl-1, 2, 3-triphosphole, (PMe)3C2H2, and 2, 3, 4, 6, 7, 8-Hexamethyl-2, 3, 4, 6, 7, 8-hexaphosphabicyclo[3, 3, 0]oetane, (PMe)6C2H2 l, 2, 3-Trimethyl-l, 2, 3-triphosphole, l, 2, 3-Trimethyl-cyclo-4, 5-dicarba-4-en-l, 2, 3-triphosphane, Hexaphosphabicyclo[3, 3, 0]octanes (eis and trans), Cyclocarbaphosphanes, Heterocyclophosphanes 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0691.pdf 
 Identifier    ZNB-1978-33b-0691 
 Volume    33