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1999 (1)
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1991 (1)
1Author    Z. Akdeniz, M. P. TosiRequires cookie*
 Title    Ionic Conduction and Molecular Structure of Molten FeCl 3  
 Abstract    Former experiments on molten FeCl 3 have shown that, as for A1C1 3 , melting is accompanied by a transition from sixfold to essentially fourfold coordination. However, in contrast to AICI3, the FeCl 3 melt near freezing has an appreciable ionic conductivity. We propose a model for the structure of FeCl 3 melt as consisting of closely packed Fe 2 Cl 6 bitetrahedral molecules in equilibrium with (Fe 2 Cl 5) + and (Fe 2 Cl 7)" ionised species. 
  Reference    Z. Naturforsch. 53a, 960—962 (1998); received November 18 1998 
  Published    1998 
  Keywords    Melting, Liquid Structure, Molecular Liquids 
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 TEI-XML for    default:Reihe_A/53/ZNA-1998-53a-0960.pdf 
 Identifier    ZNA-1998-53a-0960 
 Volume    53 
2Author    G. Abed, SalimM. KhalilRequires cookie*
 Title    Amel  
 Abstract    MINDO-forces calculations have been performed on the uncatalysed and acid-catalysed Friedel-Crafts reaction between CH 3 F and CH 4 . It has been found that the catalysed reaction is exothermic, spontaneous and has a smaller potential-energy barrier than the uncatalysed reaction. The mechanisms for uncatalysed and catalysed reactions are discussed. 
  Reference    Z. Naturforsch. 54a, 251—255 (1999); received December 22 1998 
  Published    1999 
  Keywords    Melting, Liquid Structure, Molecular Liquids 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0251.pdf 
 Identifier    ZNA-1999-54a-0251 
 Volume    54 
3Author    FrancisJ. BartisRequires cookie*
 Abstract    This problem is reconsidered in the light of the mounting evidence that dislocations act as the centres of nucleation and growth. A new relation between the fraction of the sample in liquid form and the equilibrium temperature is derived and found to fit well the data on succinonitrile and N-p-ethoxybenzylidene-p'-butylaniline (EBBA). It is argued that the additional dislocations in a cyclopentyl-l-thiaethane sample after rapid crystallization are responsible for the greater breadth of its melting transition compared to that of the same sample following slow crystallization. Past studies of the fractional melting process are criticized for their failure to include the early stages of the transition in their comparison of theory and experiment. C o u r s e o f th e M e ltin g T r a n s itio n in O r g a n ic C o m p o u n d s 
  Reference    Z. Naturforsch. 46a, 630—634 (1991); received March 31 1990 
  Published    1991 
  Keywords    Melting, Latent heat, Organic compounds, Dislocations, Impurities 
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 TEI-XML for    default:Reihe_A/46/ZNA-1991-46a-0630.pdf 
 Identifier    ZNA-1991-46a-0630 
 Volume    46