Calculation of the enthalpy of formation of the hydrogen bond in solutions of alcohols in non-polar solvents from thermodynamic data

1968 ◽  
Vol 21 (5) ◽  
pp. 1343
Author(s):  
RH Stokes
Keyword(s):  
Hydrogen Bond ◽  
Enthalpy Of Formation ◽  
Thermodynamic Data ◽  
Polar Solvents ◽  
The Enthalpy Of Formation

The enthalpy of formation and internally consistent thermodynamic data of Mg-staurolite

2002 ◽  
Vol 87 (4) ◽  
pp. 397-404 ◽  
Author(s):  
Klaus-D. Grevel ◽  
Alexandra Navrotsky ◽  
Thomas Fockenberg ◽  
Juraj Majzlan
Keyword(s):  
Enthalpy Of Formation ◽  
Thermodynamic Data ◽  
The Enthalpy Of Formation ◽  
Consistent Thermodynamic Data

Chaleurs de mélange du système éthyl-3 pentanol-3 tétrachlorure de carbone

1972 ◽  
Vol 50 (19) ◽  
pp. 3207-3211
Author(s):  
H. Brusset ◽  
M. Desgranges ◽  
J. C. Lecoq
Keyword(s):  
Hydrogen Bond ◽  
Carbon Tetrachloride ◽  
Enthalpy Of Formation ◽  
Infinite Dilution ◽  
Excess Enthalpy ◽  
Molar Fraction ◽  
Enthalpies Of Mixing ◽  
Associated Solutions ◽  
Classic Theory ◽  
The Enthalpy Of Formation

The enthalpies of mixing in the system 3-ethyl-3 pentanol–carbon tetrachloride were measured by microcalorimetry. The classic theory of associated solutions leads to an expression for the excess enthalpy which we have simplified by introducing the heat at infinite dilution for the alcohol. The resulting expression allows the enthalpy of formation of a hydrogen bond to be calculated using calorimetric and tonometric results. The calculations show that this enthalpy is independent of the concentration of the solution (up to 0.45 in molar fraction) and is in agreement with the literature.

Solvation and redox properties of [Co(en)3]3+-[Co(en)3]2+ system

1980 ◽  
Vol 45 (2) ◽  
pp. 335-338 ◽  
Author(s):  
Adéla Kotočová ◽  
Ulrich Mayer
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Specific Interaction ◽  
Redox Properties ◽  
Solvation Effect ◽  
Interacting Particles ◽  
Acid Base ◽  
Polar Solvents ◽  
Oxidation Reduction ◽  
Solvent Molecules

The solvation effect of a number of nonaqueous polar solvents was studied on the oxidation-reduction properties of the [Co(en)3]3+-[Co(en)3]2+ system. Interactions of these ions with the solvent molecules are discussed in terms of their coordination, which is accompanied by a specific interaction of the Lewis acid-base type, namely formation of a hydrogen bond between the interacting particles. This is the main controlling factor of the redox properties of the studied system.

Thermochemistry of Organic and Heteroorganic Species. Part IX. Photoionization Studies of Isomerization and Fragmentation of Polysubstituted Cyclopropenes: Phenyl-Substituted Cyclopropenes

2000 ◽  
Vol 6 (1) ◽  
pp. 53-64 ◽  
Author(s):  
V.V. Takhistov ◽  
I.N. Domnin ◽  
D.A. Ponomarev
Keyword(s):  
Mass Spectrometry ◽  
Enthalpy Of Formation ◽  
Good Alternative ◽  
Enthalpies Of Formation ◽  
Isodesmic Reactions ◽  
Ion Structure ◽  
Photoionization Mass Spectrometry ◽  
General Methodology ◽  
Fragment Ions ◽  
The Enthalpy Of Formation

Ionization and appearance energies of some fragment ions from 1,2,3-trimethy1-3-phenyl-, 3-methyl-1,2,3-triphenyl-, 1,2-diphenyl-3-methoxycarbonyl-, 1,2,3-triphenyl-3-methoxycarbonyl- and 1,3,3-triphenyl-2-methoxycarbonyl-cyclopropenes were measured by photoionization mass spectrometry. It was shown that in none of these compounds did the fragment ions possess the expected stable substituted cyclopropenium ion structure. Accordingly, possible schemes of molecular ion isomerization are given. The enthalpies of formation of nearly 50 substituted cyclopropenium ions, and ions of related structure, were estimated using series of isodesmic reactions. This publication, together with the previous works of the authors in this Journal, demonstrates the general methodology for estimation of the enthalpy of formation for even-electron ions. It is suggested that the present methodology can provide a good alternative to other estimation or computation procedures applied to the thermochemistry of ions.

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