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1999 (2)
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1Author    H. Oppermann, A. MorgensternRequires cookie*
 Title    Verdampfungsverhalten von Lanthantrihalogeniden Evaporation Behaviour o f Lanthanum Trihalides  
 Abstract    The evaporation of LaCl3, LaBr3 and Lal3 was investigated in closed tubes under argon atmosphere and correlated with data in the literature. The enthalpies and entropies of evaporation were derived from the temperature functions of pressure: -AH°(v, LaCl3, T) = 48,5 ± 2 kcal/mol, Z\S°(v, LaCl3, T) = 22,0 ± 3 cal/K-mol _AH°(v, LaBr3, T) = 48,0 ± 2 kcal/mol, Z\S°(v, LaBr3, T) = 24,0 ± 2 cal/K-mol J H ° (v , L al3, T) = 49,5 ± 2 kcal/mol, Z\S°(v, L al3, T) = 29,0 ± 2 cal/K-mol 
  Reference    Z. Naturforsch. 54b, 617—623 (1999); eingegangen am 11. Februar 1999 
  Published    1999 
  Keywords    Lanthanum Trihalides, Evaporation, Enthalpy, Entropy 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0617.pdf 
 Identifier    ZNB-1999-54b-0617 
 Volume    54 
2Author    G. AndereggRequires cookie*
 Title    Komplexone, XLVII Die Thermodynamik der Komplexbildung von einigen ein-und zweiwertigen Metallionen mit Aethylendiamintetraacetat-und Uramildiacetat-Ion Complexone, XLVII Thermodynamics of Complex Formation of Some Univalent and Bivalent Metal Ions with Ethylenediaminetetraacetate and Uramildiacetate Anions  
 Abstract    The enthalpies of complex formation of EDTA and uramildiacetate (UDA) with univalent cations (H+, Li+, Na+, K + , Ag+ and T1+) have been obtained by direct calori-metric measurements at ionic strength 0.1 (or 1) and 20 °C. For comparison data for the formation of 1:1 UDA complexes with Mg 2+ , Ca 2+ , Ba 2+ and Sr 2+ have also been obtained. From these values and the stability constants the thermodynamic functions A G and A S are calculated. The results are compared with those of similar systems. 
  Reference    (Z. Naturforsch. 31b, 786—789 [1976]; eingegangen am 15. März 1976) 
  Published    1976 
  Keywords    EDTA Complexes, Uramildiacetate Complexes, Stability Constants, Enthalpy, Entropy 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0786.pdf 
 Identifier    ZNB-1976-31b-0786 
 Volume    31 
3Author    H. Oppermann, M. Zhang, C. Hennig, HeinzDieter LutzRequires cookie*
 Title    Thermochemisches und kalorisches Verhalten von NdA^Cl^ Thermochemical and Calorical Behaviour of NdAl3C l12  
 Abstract    The thermodynamical data of solid and gaseous aluminium neodymium chloride have been obtained by determination of the decomposition equilibria (of solid) from total pressure mea­ surements and chemical transport reactions (gaseous). The melting diagram was determined by DTA. The enthalpy of formation of the solid phase was calculated from their heats of solution and from the enthalpies of formation and the heats of solution of NdCl3 and A1C13. Data by total pressure measurement: ^ H |(N d A l3Cl,2<f<298) = -749,6 ± 2,5 kcal/mol; S°(NdAl3C l12ifj298) = 118,2 ± 3,0 cal/K-mol. Data by solution calorimetry: zAHß(NdAl3C l|2 1298) = -748,6 ± 1,3 kcal/mol. Data by chemical transport: zAH£(NdAl3C l12>g,298) = -701,5 ± 3,0 kcal/mol; S°(NdAl3Cl12-g,298) = 215,0 ± 4,0 cal/K-mol. 
  Reference    Z. Naturforsch. 53b, 1343—1351 (1998); eingegangen am 21. Juli 1998 
  Published    1998 
  Keywords    Aluminium Neodymium Chloride, Decomposition, Thermochemical Data, Enthalpy, Entropy 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1343.pdf 
 Identifier    ZNB-1998-53b-1343 
 Volume    53 
4Author    H. Oppermann, H. Dao Quoc, A. Morgenstern, Prof ManfredRequires cookie*
 Title    Thermisches Verhalten von festem LaAlCl6 und chemischer Transport von LaCl3 mit AICI3 Thermical Behaviour of Solid LaAlCl6 and Chemical Transport of LaCl3 with A1C13  
 Abstract    The thermodynamical data of solid aluminium lanthanum chloride LaAlCl6 have been ob­ tained by determination of the decomposition equilibria from total pressure measurements. The melting diagram was determined by DTA. The chemical transport of LaCl3 with A1C13 is suggesting the existence of the gaseous complex LaAl3C l12. The data are: Z\H(LaAlCl6 f 298) =-427,1 ±2,5 kcal/mol, S°(LaAlCl6.f.298) = 61 ±2,5 cal/K-mol, _AH(LaAl3C l12 g 298) =-712 ± 7 kcal/mol, S°(LaAl3C l12>g,298) = 205 ± 3 cal/K-mol. 
  Reference    Z. Naturforsch. 54b, 1410—1416 (1999); eingegangen am 15. Juli 1999 
  Published    1999 
  Keywords    Aluminium Lanthanum Chloride, Thermal Decomposition, Chemical Transport, Enthalpy, Entropy 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1410.pdf 
 Identifier    ZNB-1999-54b-1410 
 Volume    54