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1Author    Karl-Heinz Zirzow, Alfred SchmidpeterRequires cookie*
 Title    Tetraphospholan-Bildung via Phosphaalken durch LiSnPh 3 -katalysierte PhP-Übertragung Formation of a Tetraphospholane via Phosphaalkene by LiSnPh ? -Catalyzed Transfer of PhP Units  
 Abstract    Lithium triphenylsilyl-phenylphosphide (3), X = SiPh 3 , reacts with ketones to give tetraphenyl-phospholanes (6). In an initial step a phosphaalkene 5 is formed, which then adds three more phenylphosphinidene units. This second step can be performed independently, and the PhP units can be furnished by pentaphenylcyclopentaphosphane (1) if the reaction is catalyzed by lithium triphenylstannide (2), X = SnPh v 
  Reference    Z. Naturforsch. 43b, 1475—1477 (1988); eingegangen am 14. Juli 1988 
  Published    1988 
  Keywords    Silyl-and Stannylphosphides Phosphaalkenes, Reversible Nucleophilic Degradation, Phosphorus Heterocycles 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1475.pdf 
 Identifier    ZNB-1988-43b-1475 
 Volume    43 
2Author    Dietrich Gudata, AndreasW. Holderberg3, Nikolaus Korberb, Martin Nieger3, Martin Schrott3Requires cookie*
 Title    Bis-phosphonio-isophosphindolide Copper Complexes  
 Abstract    Bis-triphenylphosphonio-isophosphindolide salts 1[X] react with Cu(I)-halides CuX to give isolable products of composition [(l)Cu2X3]. X-ray crystal structure analyses confirmed that for X = Br, Cl dinuclear complexes [(/y-1)(/i-X)Cu2X2] with /i2j;'(P)-bridging cations 1 are formed, while for X = I a solid phase containing a salt (l^lC u*^] and a complex [(l^ C u .^ ] with a terminal ?/(P)-coordinated ligand 1 was obtained. The bonding parameters in the two types of complexes suggest that l i s a hybrid between a phosphenium cation and a phospholide anion whose 7T-system is less nucleophilic than the phosphorus lone-pair.31P NMR studies revealed that in solution in all cases binuclear complexes [(l)Cu2X3] are in dynamic equilibrium with small amounts of mononuclear species and free 1. The same equilibria were detected in the system l[OTf]/CuOTf. NMR studies of ligand exchange reactions indicated that the stability of complexes [(l)Cu2X3] increases in the order X = OTf < 1 < Br, Cl, and titration of [(l)Cu2Bn] with EuNBr allowed to determine the equilibrium constant of the complex formation reaction. 
  Reference    Z. Naturforsch. 54b, 1244—1252 (1999); received July 6 1999 
  Published    1999 
  Keywords    Phosphorus Heterocycles, Copper Complexes, Crystal Structure, '' P NMR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1244.pdf 
 Identifier    ZNB-1999-54b-1244 
 Volume    54 
3Author    M. Arianne Bäudler, JosefH. AhnRequires cookie*
 Title    Zur Existenz eines Triphosphacyclobutenid-Ions P3CH20 Contributions to the Chemistry of Phosphorus, 204 [1] On the Existence of a Triphosphacyclobutenide Ion P3C H 2e  
 Abstract    The structure o f the reaction product o f white phosphorus and sodium in diglyme which exhibits a low field AB2 system in the 31P {'H } N M R spectrum [4] has been reexamined. A c­ cording to the results o f a complete analysis o f its proton coupled 31P N M R spectrum (ABB'XX' system), the compound is the hitherto unknown 1,2,3-triphosphacyclopentadienide 
  Reference    Z. Naturforsch. 45b, 1139—1142 (1990); eingegangen am 9. Februar 1990 
  Published    1990 
  Keywords    Triphosphacyclobutenide Ion, 1, 2, 3-Triphosphacyclopentadienide Ion, Tetraphosphacyclopentadienide Ion, Phosphorus Heterocycles 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1139.pdf 
 Identifier    ZNB-1990-45b-1139 
 Volume    45 
4Author    Alfred Schm, Stefan Planka, Kurt PolbornbRequires cookie*
 Title    2-YIidvl-l,3,2-oxathiaphosphole und -oxaselenaphosphole 2-Ylidyl-l,3,2-oxathiaphospholes and -oxaselenaphospholes  
 Abstract    Ylidyl thioxophosphines or selenoxophosphines and phenacyl halides undergo addition in a 1:1 ratio and yield in the presence of triethylamine the title compounds. The molecular structure of an ylidyl oxathiaphosphole demonstrates a strong interaction between the ylid substituent and the heterocycle, making the exocyclic PC-bond unusually short and the end-ocyclic PO-and PS-bonds considerably longer than normal for a pyramidal phosphorus atom. The ylidyl chalcogenoxophosphines are oxidized by sulfur or selenium at the phosphorus atom and protonated at the ylidic carbon atom. N o Wittig-type reaction is observed. Ein Ylidyl-thioxo-und -selenoxophosphan (Thioxo-und Selenoxophosphanyl-ylid) 1,2 [1,2] 
  Reference    Z. Naturforsch. 50b, 1543—1549 (1995); eingegangen am 10. Mai 1995 
  Published    1995 
  Keywords    Phosphino-Ylides, Thioxo-and Selenoxophosphanes, Cyclocondensation, Phosphorus Heterocycles, N egative Hyperconjugation 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1543.pdf 
 Identifier    ZNB-1995-50b-1543 
 Volume    50 
5Author    Phosphonio-Substituted Tetrahydro-, -Diphosphinines, -Azaphosphinines, Georg Jochem, Martin Schm, HeinrichN. Öth ', Alfred SchmidpeterRequires cookie*
 Title    Phosphonio-substituierte Tetrahydro-l,3-diphosphinine un(j Tetrahy dro-1,2,6-azad i phospli in i ne  
 Abstract    The bis(triphenylphosphonio)propenide cation 1 provides two reactive CH sites in 1,3-position and can be condensed with the bis(dichlorophosphanyl)methylene triphenylphos-phorane 2 or the bis(dichlorophosphanyl)aniline 3 to form cationic six-membered rings: A tetrahydro-1,3-diphosphinine (4) with three phosphonio or phosphoranediyl substituents in 2,4,6-position and a tetrahydro-1,2,6-azadiphosphinine (5) carrying two such substituents in 3,5-position. The bromide of the latter was used for an X-ray structure analysis. The P111 ring members of the cations 4 and 5 can be oxidized in two steps by elemental sulfur to give the monothioxo and dithioxo derivatives 6. 7 and 8, 9. respectively. A crystal of the mixed chloride/bromide of 8 was used for another X-ray structure analysis. 
  Reference    Z. Naturforsch. 51b, 1761—1767 (1996); eingegangen am 16. August 1996 
  Published    1996 
  Keywords    Dichlorophosphanyl Ylides and Amines, Cyclocondensation, Phosphorus Heterocycles, 1, 3-Diphosphinines, 1, 2, 6-Azadiphosphinines 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1761.pdf 
 Identifier    ZNB-1996-51b-1761 
 Volume    51