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  • activity coefficients  (1)
  • macrocyclic ligands  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Isothermal vapor-liquid equilibria of mixtures containing organic compounds. Part 5: Excess Gibbs energies of dichloromethane or chlorobutane + linear ether or acetal mixtures at 25°C1 (1991)
    Springer
    Journal of solution chemistry 20 (1991), S. 57-70 
    Details
    ISSN: 1572-8927
    Keywords: Vapor-liquid equilibria ; activity coefficients ; excess Gibbs energy ; Gibbs energy of solvation ; group contributions ; binary systems ; oxaalkanes ; chloroalkanes ; solute-solvent interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Vapor-liquid equilibria for dichloromethane or chlorobutane+a linear mono-, or diether (diethyl ether, dipropyl ether, methyl butyl ether, 1,2-dimethoxyethane,) or an acetal (diethoxymethane), were determined at 25°C by head-space gas chromatographic analysis of the vapor phase directly withdrawn from an equilibration apparatus. Excess Gibbs energies, G E , activity coefficients at infinite dilution, f i o as well as free energy of solvation, ΔG o , were evaluated for all the systems. A tentative approach is presented based either on an additivity scheme of surface interactions and scaled particle theory to calculate group contribution to the free energy of solvation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651640
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamic studies on the addition of molecular oxygen to Co(II)-1,4,8,12 tetraazacyclopentadecane in aqueous solution at 25°C (1986)
    Springer
    Journal of solution chemistry 15 (1986), S. 177-187 
    Details
    ISSN: 1572-8927
    Keywords: Thermodynamics of oxygen binding ; Co(II) oxygen-carrier complexes ; macrocyclic ligands ; tetraazacyclopentadecane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Aqueous solutions containing Co2+ and the macrocyclic ligand 1,4,8,12-tetraazacyclopentadecane (L) are able to bind reversibly molecular oxygen to form the species Co2L2O 2 4+ between pH 5 and 7. This species at pH greater than 8 is replaced by the complex Co2L2O2 (OH) 2 2+ whose concentration in the solution increases to about pH 10.5. At pH greater than 10.5, Co(II) exists totally in this μ-peroxobisydroxo complex. Both the above mentioned oxygenated forms suffer a relatively slow irreversible oxidation to Co(III). From oxygen binding curves, approximate values of the equilibrium constants were calculated for the addition of oxygen to CoL2+ to form the μ-peroxo and the μ-peroxo-bishydroxo complexes. The enthalpies of formation of this latter complex starting from both Co2+ or CoL2+ have been obtained by means of calorimetric measurements. The effects of the size of the macrocyclic ligand on the affinity and the enthalpy of oxygen binding have been considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646289
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