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'Oxidative Addition' in keywords Facet   Publication Year 1990  [X]
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1990[X]
1Author    Johannes Breker, Reinhard Schmutzler, BerndD. Orbath, M. Arkus WieberRequires cookie*
 Title    Reaktionen von unsymmetrischen A5P -A 3P-Diphosphorverbindungen und von Diphosphinen (A3P -A 3P) mit ö-Chinonen Reactions of Unsymmetrical /i5P -/ 3P D iphosphorus Compounds and of Diphosphines (>l3P -A 3P) with o-Quinones  
 Abstract    The reaction o f A5P -x 3P diphosphorus com pounds with o-quinones, e.g. tetrachloro-o-benzoquinone or 2,5-di-te/7-butyl-o-benzoquinone, led not only to oxidative addition o f the o-quinone to A3P but also to insertion o f a further molecule o f o-quinone into the P -P bond (i.e. x5P -Ä 3P diphosphorus com pound and o-quinone reacted in a molar ratio 1:2). In the course o f these oxidative addition and insertion reactions the o-quinones were converted into the corresponding hydroquinones (i.e. catechols). The products o f these reactions were charac­ terized by N M R and mass spectrometric methods, and by elemental analysis. The hydrolysis o f the 1:2 addition products proceeded with cleavage o f a P -O -C (hydroquinone) bond and formation o f mononuclear products, involving Ä4P and A5P, respectively. A mechanism o f this hydrolysis is proposed and has been elucidated by independent synthesis o f some products. Diphosphines, i.e. symmetrical A3P -z 3P diphosphorus compounds, were found to react with o-quinones in the same fashion in a molar ratio 1:3, i.e. with oxidative addition o f the o-quinone to both x3P atom s and insertion o f tetrachloro-o-catechol into the P -P bond. 
  Reference    Z. Naturforsch. 45b, 1177—1186 (1990); eingegangen am 13. Oktober 1989 
  Published    1990 
  Keywords    Phosphoranes, Insertion, Oxidative Addition 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1177.pdf 
 Identifier    ZNB-1990-45b-1177 
 Volume    45