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1982 (1)
1981 (1)
1Author    Alfred StaniendaRequires cookie*
 Title    Energiebilanz einer Reaktion zwischen Radikal-Kation und Radikal-Anion Energy Turnover of a Reaction between Radical Cation and Radical Anion  
 Abstract    AG for the reaction R ,+ + R-~ -> 2 R + AG was calculated according to AG = —(IP-EA) = —A Ei for the reaction in gas phase under ideal conditions. The result was compared with A H in solution measured calorimetrically and the entropy term measured voltammetrically according to AG = A H — TzlS. Both values for AG agreed satisfactorily. From this it was derived that the solvation energies of R ,+ and R— com-pensate mutually. The Coulomb energies have little influence on A G only. 
  Reference    Z. Naturforsch. 36b, 601—608 (1981); eingegangen am 29. Dezember 1980 
  Published    1981 
  Keywords    Radical Ions, Reaction Enthalpy, Ion Solvation, Energy Levels 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0601.pdf 
 Identifier    ZNB-1981-36b-0601 
 Volume    36 
2Author    Gemot Frenking, Helmut SchwarzRequires cookie*
 Title    ab i/ifüo-Rechnungen zur relativen Stabilität der Neutralmoleküle, Radikalkationen und -anionen von Allen und Propin ab initio Calculations on the Relative Stabilities of the Neutrals, Radical Cations and Anions of Allene and Propvne  
 Abstract    Ab initio calculations demonstrate that, in agreement with experimental results, the oxidation of both allene (1) and propyne (2) to their corresponding cation radicals (1+ -and 2+ -) is associated with a reversal of the stability order. Whereas for the neutral molecules 1 is thermochemically less stable than 2 (zMHf° = 1.3 kcal/mol) the opposite holds for the cation radicals (1+ -is 13.3 kcal/mol more stable than 2 +-). The radical anions of 1 and 2 do also show a reversed stability order (l +< being 5.1 kcal/mol more stable than 2 _ .); however, both radical anions are predicted to undergo spontaneous electron detachement, thus giving their neutral counterparts (negative electron affinities). The changes in geometries and charge distributions associated with the redox reactions of 1 and 2 are briefly dis-cussed. 
  Reference    Z. Naturforsch. 37b, 1602—1605 (1982); eingegangen am 5. August 1982 
  Published    1982 
  Keywords    Molecular Orbital Calculations, Unsaturated Hydrocarbons, Radical Cations, Radical Ions 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1602.pdf 
 Identifier    ZNB-1982-37b-1602 
 Volume    37