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'Cadmium' in keywords Facet   Publication Year 1998  [X]
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1998[X]
1Author    Reint Eujen, Ralf HaigesRequires cookie*
 Title    Reaktionen des donorfreien (C F 3 )2Cd mit Phosphor(V)halogeniden: Difluorcarben-Einschiebungen und Direktsynthese von (C F 3)3PF2 Reactions of Donor-Free (CF3)2Cd with Phosphorus(V) Halides: Insertion of Difluorocarbene and Direct Synthesis of (CF3)3PF2  
 Abstract    Difluorocarbene which is quantitatively eliminated from donor-free bis(trifluoromethyl)-cadmium below 0 °C inserts smoothly into the P-F bonds o f PF5 to form (CF3)3PF2 in high yield. Due to the fast conversion of P-Cl bonds into P-F bonds by cadmium fluoride, PC15 forms (CF3)3PF2 as well, and a direct synthesis of (CF3)3PF2 with ca. 70 % yield starting from CdEt2, CF3I and PC15 is reported. Whereas no insertion o f CF2 into the axial bonds o f (CF3)3PF2 has been detected, reaction o f (CF3)2Cd with (CF3)3PC12 gives the new tetra-kis(haloalkyl)fluorophosphoranes (CF3)3(CF2C1)PF, (CF3)3(CFC12)PF, (CF3) 2 (CF2C1)2PF and (CF3)3(CC13)PF. The NMR spectra of these and related compounds and of their hydrolysis products (CF3)3(CF3_"Cln)PO are reported. The formation of the higher chlorinated phos­ phoranes is discussed in terms o f an isomerization mechanism presumably involving carbene elimination-reinsertion processes. 
  Reference    Z. Naturforsch. 53b, 1455—1460 (1998); eingegangen am 3. Juli 1998 
  Published    1998 
  Keywords    Phosphoranes, Trifluoromethyl Compounds, Difluorocarbene, Cadmium, NM R Data 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1455.pdf 
 Identifier    ZNB-1998-53b-1455 
 Volume    53