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'UV' in keywords Facet   Publication Year 1979  [X]
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1Author    Jürgen KeimRequires cookie*
 Title    Ein Beitrag zur Photochemie aromatischer Nitroverbindungen, III* A Contribution to the Photochemistry of Aromatic Nitro Compounds  
 Abstract    During UV irradiation of nitrobenzene and some derivatives in benzene solution biphenyls are formed as in the case of the corresponding iodobenzenes. Using fluorobenzene as a solvent, isomeric fluorobiphenyls (o, TO, p) will be found as reaction products having a definite distribution (o >m > p), which is characteristic for substitution by radicals. Therefore, we conclude that the CN-bond is split homolytically. Besides the biphenyls, other important reaction products of the aromatic nitro compounds -phenols and nitro-phenols -are identified. 
  Reference    Z. Naturforsch. 34b, 995—998 (1979); eingegangen am 28. Februar 1979 
  Published    1979 
  Keywords    Photochemistry, Aromatic Nitro Compounds, UV 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0995.pdf 
 Identifier    ZNB-1979-34b-0995 
 Volume    34 
2Author    Richard Ratka, ManfredL. Ziegler, Gerhard SchillingRequires cookie*
 Title    Darstellung und Charakterisierung von chiralen und achiralen exocyclischen 7r-enyl-Komplexen der Zusammensetzung (C8H13PdCl)2 Synthesis and Characterization of Exocyclic jr-Enyl Complexes of the Composition (C8Hi3PdCl)2  
 Abstract    The mechanism of formation of the exocyclic dimeric jr-enyl complex (C8Hi3PdCl)2 by reaction of 1,3-dimethylenecyclohexane, C8HI2 with irans-PdCl2(C6H5CN)2 is discussed. Through UV, X H NMR (90 MHz, 360 MHz) and 13 C spectroscopic studies it was possible to show that the dimer is formed by the disproportionate of C8Hi2 to C8Hi4 and m-xylene, and further that it consists of diastereomeric products. The reaction of (—) R-3-methyl-1-methylencyclohexane, C8Hi4, with the Pd-salt confirms that during the reaction between C8Hi2 and <mns-PdCl2(C6H5CN)2 no free C8H14 is formed in solution. Studies on cleavage reactions of the dimer are also described in this paper. 
  Reference    Z. Naturforsch. 34b, 579—584 (1979); eingegangen am 23. November 1978 
  Published    1979 
  Keywords    ji-Enyl Complexes, UV, m NMR 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0579.pdf 
 Identifier    ZNB-1979-34b-0579 
 Volume    34