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'Phosphites' in keywords Facet   section ZfN Section B  [X]
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1995 (1)
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1Author    Dainis Dakternieks, Gerd-Volker Röschenthaler, Reinhard SchmutzlerRequires cookie*
 Title    Synthesis of Chiral and Non-chiral Phosphites Containing the Hexafluoroisopropoxy Group  
 Abstract    A series of new phosphorus (III) compounds containing the hexafluoroisopropoxide group has been synthesised by reacting halophosphines with lithium hexafluoroisoprop-oxide. The phosphites Bu<PX[OCH(CF3)2] (where X = F, Cl), Bu«MeP[OCH(CF3)2] and C6HsPF[OCH(CF3)2] each contain a chiral center at phosphorus. 
  Reference    Z. Naturforsch. 33b, 507—510 (1978); received February 13 1978 
  Published    1978 
  Keywords    Phosphites, Halophosphites, Chirality, Lithium Hexafluoroisopropoxide 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0507.pdf 
 Identifier    ZNB-1978-33b-0507 
 Volume    33 
2Author    Uwe Rosenthal, Siegmar Pulst, PerditaA. Rndt, Wolfgang Baumann, Annegret Tillack, R. Hett KempeRequires cookie*
 Title    Zum Ligandeinfluß in neuen Ni(0)-Komplexen disubstituierter Butadiine On the Influence of Ligands in New Ni(0) Complexes of D isubstituted Butadiynes  
 Abstract    It has been shown that disubstituted butadiynes react with L2Ni(C2H 4) to yield m ono­ nuclear complexes L2Ni(?/2(l:2)-R C = C -C = C R) (L = o-T ol-0)3P, R = SiMe3 (1), 'Bu (2), Ph (3)). For the first time, the crystal structure of a nickel(O) alkyne complex carrying phosphite ligands (2) has been determined. The reaction of (dipy)Ni(cod) (L2 = dipy) with butadiynes R 'C = C -C = C R is strongly influenced by the substituents of the butadiyne. With R' = R = SiMe3 (4), 'Bu (5) and Ph (6) or R' = Ph, R = SiMe3 (7) and R ' = 'Bu, R = SiMe3 (8) mononuclear complexes (dipy)Ni(?72(l:2)-R 'C = C -C = C R) have been observed. Depending on the stoichiometry with R = R ' = Ph (9) and 'Bu (10) dinuclear complexes |(dipy)Ni}2(/<-?72(l:2),?72(3 :4)-R 'C = C -C = C R) having two Ni atoms coordinated to two C = C triple bonds were obtained. By contrast, with R ' = R = SiMe3 (11), R' = 'Bu, R = SiMe3 (12) and R' = Ph, R = SiMe3 (13) the two Ni-centers were found to coordinate to the same C = C triple bond to yield another type of a dinuclear complex {(dipy)Ni}2(w-?72(l:2),//2(l:2)-R 'C = C -C = C R). Com pound 5 has been characterized by X-ray crystal structure analysis. The structures of 2 and 5 are com pared to that of the well-known complex (Ph3P)2Ni(?72(l:2)-'B u C = C -C = C 'B u) [1] to study the influence of different ligands L on the structural details. In comparison to the alkyne complexes L2Ni(//2-R C = C R) in butadiyne complexes of the L2Ni(//2(l:2)-R 'C = C -C = C R) type there is only a slight effect of the different ligands. The uncomplexed C = C triple bond as a part of the second substi­ tuent in conjugation to the complexed C = C triple bond appears to level out the influence of ligands and substituents. 
  Reference    Z. Naturforsch. 50b, 368—376 (1995); eingegangen am 4. O ktober 1994 
  Published    1995 
  Keywords    Butadiyne, Phosphite, Dipyridyl, Crystal Structure, Nickel(O) Complexes 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0368.pdf 
 Identifier    ZNB-1995-50b-0368 
 Volume    50 
3Author    M. Anuela Klein, Ivar UgiRequires cookie*
 Title    2-(4-ToIuenesulphonyl)-3-aryloxaziridines as Oxidizing Reagents for P(III) Compounds  
 Abstract    The preparation o f four 2-(4-toluenesulphonyl)-3-aryloxaziridines by oxidation o f the cor­ responding imines by peracids is described. The relative oxidation rates o f trimethyl phosphite by these oxaziridines are determined. 
  Reference    Z. Naturforsch. 47b, 887—8 (1992); received February 24 1992 
  Published    1992 
  Keywords    2-(4-Toluenesulphonyl)-3-aryloxaziridines, Oxidizing Reagent, Phosphites, Relative Oxidation Rates 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0887.pdf 
 Identifier    ZNB-1992-47b-0887 
 Volume    47