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'Diphosphiranes' in keywords
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1995 (1)
1986 (1)
1978 (1)
1Author    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 
2Author    Frank Bitterer, KlausPeter Langhans, Othm Ar StelzerRequires cookie*
 Title    Lineare Oligophosphaalkane, XXVIII [1] Redox-Cyclisierung funktioneller Methylenbisphosphane X R P -C H 2-P R X (X = H, CI) mit Cyclopolyphosphanen Linear Oligophosphaalkanes, XXVIII [1] Redox Cyclization of Functional Methylenebisphosphanes X R P -C H 2-P R X (X = H, Cl) with Cyclopolyphosphanes  
 Abstract    Reaction of P -H or P -C l functional methylenebisphosphanes X (R)P -C H 2-P (R)X (X = H, Cl; R = Ph, /Bu) with cyclopolyphosphanes (R'P)" (R' = Ph, /Bu, Me; n = 4, 5) affords cyclocarbatetraphosphanes CH2(R P)2(R 'P)2 (2 -6). The cyclopolyphosphanes (R'P)" em ­ ployed may be synthesized in situ by reaction of chlorophosphanes R'PC12 with primary phosphanes R'PH2, LiH or magnesium, respectively, providing a single stage synthesis for unsymmetrically substituted cyclocarbatetraphosphanes. 
  Reference    Z. Naturforsch. 50b, 1521—1526 (1995); eingegangen am 1. März 1995 
  Published    1995 
  Keywords    Functional M ethylenebisphosphanes, R edox Cyclizations, Cyclopolyphosphanes, Cyclocarbatetraphosphanes, Diphosphiranes 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1521.pdf 
 Identifier    ZNB-1995-50b-1521 
 Volume    50 
3Author    Siegfried Lochschmidta, G. Erhard, M. Üllerb, BrigitteH. Uberh, Alfred SchmidpeteraRequires cookie*
 Title    ,2-Diphosphonio-diphosphirane 1,2-Diphosphonio-diphosphiranes  
  Reference    Z. Naturforsch. 41b, 444—454 (1986); eingegangen am 27. N ovem ber 1985 
  Published    1986 
  Keywords    Am inosubstituted Triphosphenium Ions, Diphosphiranes, Tetraphosphane-1, 4-diium Ions Phosphoniophosphinidene Transfer, X -R ay 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0444.pdf 
 Identifier    ZNB-1986-41b-0444 
 Volume    41