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'Hexasubstituted Benzenes' in keywords
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1984 (1)
1Author    Rainer Diercks, Heindirk Tom DieckRequires cookie*
 Title    Diazadiene als Steuerliganden in der Homogenen Katalyse, VIII [1] Katalytische Trimerisierung substituierter Acetylencarbonsäureester und Isolierung eines Acetylendicarbonsäureester-Diazadien-Nickel(O)-Addukts Diazadienes as Controlling Ligands in Homogeneous Catalysis, VIII [1] Catalytic Trimerization of Substituted Acetylene Carbonic Acid Esters and Isolation of an Acetylene Dicarbonic Acid Ester Diazadiene Nickel(O) Adduct  
 Abstract    Nickel(O) complexes of diazadienes (dad = RN = CR — C R '=N R) catalyse the trimerization of esters of 2-butynoic acid, phenylpropynoic acid and butynedioic acid to give hexasubstituted benzenes with the unsymmetrical esters 2 as the main products. A primary adduct 7 of acetylene dicarboxylic acid dimethyl ester of the type (dad)Ni(alkyne) could be isolated and characterized by 'H NMR, IR and UV spectroscopy. According to their characteristic CT absorption. 7 and its analogues are shown to persist during catalysis as an active species. 
  Reference    Z. Naturforsch. 39b, 180 (1984); eingegangen am 24. August 1983 
  Published    1984 
  Keywords    Catalytic Trimerization, Diazadiene Nickel Complexes, Alkynes, Hexasubstituted Benzenes, Alkyne Complexes 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0180.pdf 
 Identifier    ZNB-1984-39b-0180 
 Volume    39