Vapor Pressures of Triethylamine + Chloroform and of Diethyl Ether + Chloroform at 298.15 K

1975 ◽  
Vol 53 (21) ◽  
pp. 3299-3304 ◽  
Author(s):  
Yash Paul Handa ◽  
David Edward Jones
Keyword(s):  
Diethyl Ether ◽  
Equilibrium Constants ◽  
Formation Constants ◽  
Enthalpies Of Formation ◽  
Vapor Pressures ◽  
Complex Formation Constants ◽  
Standard Enthalpies Of Formation ◽  
Vapor Pressure Measurements ◽  
Associated Solution Model ◽  
Associated Solution

Vapor pressures of triethylamine + chloroform and of diethyl ether + chloroform were measured at 298.15 K with a calibrated quartz spiral. The ideal associated solution model has been used to determine the equilibrium constants and standard enthalpies of formation of the complexes from the thermodynamic properties derived from the vapor pressure measurements and from earlier calorimetric measurements. These complex formation constants are compared with values obtained by calorimetric and spectroscopic methods.

scholarly journals Thermodynamics of metal-ligand bond formation. VIII. Pyridine adducts of zinc(II) β-diketonates

1973 ◽  
Vol 26 (11) ◽  
pp. 2537 ◽  
Author(s):  
DR Dakternieks ◽  
DP Graddon
Keyword(s):  
Benzene Solution ◽  
Equilibrium Constants ◽  
Bond Formation ◽  
Formation Constants ◽  
Adduct Formation ◽  
Enthalpies Of Formation ◽  
Calorimetric Titration ◽  
Experimental Conditions ◽  
Metal Ligand ◽  
Ligand Bond

Equilibrium constants and enthalpies in benzene solution are reported for the formation of 1 : 1-adducts of pyridine with four zinc(II) complexes of β-diketones, determined by calorimetric titration. Adduct formation constants at 30�C fall in the range 300-2000 and enthalpies of formation lie between -15 and - 34 kJ mol-1. Though the enthalpies of formation differ little from those of corresponding copper(II) complexes, the adducts are about a hundred times more stable. The pyridine adduct of bis(2,2,6,6-tetramethylheptane-3,5-dionato)zinc(II) is entropy-stabilized relative to those of other complexes. No evidence was obtained for the addition of a second molecule of pyridine under the experimental conditions used.

Thermodynamics of complex formation in chloroform + 1,4-dioxane

1989 ◽  
Vol 67 (7) ◽  
pp. 1225-1229 ◽  
Author(s):  
L. Barta ◽  
Z. S. Kooner ◽  
L. G. Hepler ◽  
G. Roux-Desgranges ◽  
J.-P. E. Grolier
Keyword(s):  
Complex Formation ◽  
Solution Model ◽  
Vapor Pressures ◽  
Chemical Interactions ◽  
Ideal Solution Behavior ◽  
Ideal Associated Solution Model ◽  
Thermodynamics Of Complex Formation ◽  
Associated Solution Model ◽  
Associated Solution ◽  
The Ideal

We have made new measurements of excess heat capacities and excess volumes of mixtures of chloroform and dioxane. In combination with published vapor pressures and excess enthalpies the results have been analyzed using the ideal associated solution model to yield K, ΔHθ, ΔCpθ, and ΔVθ for the formation of AB and A2B complexes. It is demonstrated that the ideal associated solution model is consistent with all of the available thermodynamic data for this system, indicating that chemical interactions of the two components can account for nearly all of the deviations from ideal solution behavior. The results of our thermodynamic analysis are discussed in relation to the results of similar analyses of other systems in which there are strong chemical interactions of chloroform with electron-donor molecules. Keywords: complex formation, hydrogen bonding, ideal associated solution model, chloroform, 1,4-dioxane.

scholarly journals Regular Associated Solution Model for the Estimation of Free Energy of Mixing of Binary Liquid Alloys

1970 ◽  
Vol 8 (8) ◽  
pp. 30-33
Author(s):  
D Adhikari ◽  
BP Singh ◽  
IS Jha
Keyword(s):  
Free Energy ◽  
Equilibrium Constants ◽  
Solution Model ◽  
Interaction Energies ◽  
Free Energies ◽  
Scientific World ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing ◽  
Associated Solution Model ◽  
Associated Solution

We have found the equilibrium constants and pairwise interaction energies between the species and the complexes of liquid CuSn, AgAl, FeSi, CdNa and HgNa alloys on the basis of regular associated solution model. These parameters are then used to estimate the free energies of mixing of each alloy. The observed asymmetry in the free energy of mixing of each alloy with respect to concentration is well explained. Key Words: Free energy of mixing; Asymmetry; Binary alloys; Interaction energy. DOI: 10.3126/sw.v8i8.3842 Scientific World Vol.8(8) 2010 pp.30-33

scholarly journals Determination of Distribution Equilibrium-Potential Differences Based on Extraction with Several Crown Ethers by Nitrobenzene, 1,2-Dichloroethane and Dichloromethane

2017 ◽  
Vol 9 (4) ◽  
pp. 110 ◽  
Author(s):  
Yoshihiro Kudo ◽  
Tomohiro Amano ◽  
Satoshi Ikeda
Keyword(s):  
Complex Formation ◽  
Conditional Distribution ◽  
Equilibrium Constants ◽  
Formation Constants ◽  
Equilibrium Potential ◽  
Complex Formation Constants ◽  
Extraction Constants ◽  
Distribution Constants ◽  
Extraction Equilibria

Extraction constants (Kex± & Kex) were determined at 298 K for the extraction of sodium picrate (NaPic) by nitrobenzene (NB), 1,2-dichloroethane (DCE) and dichloromethane using 3m-crown-m ethers and their benzo-derivatives (m = 5, 6; abbreviated as L) together with the determination of conditional distribution constants (KD,Pic) of picrate ion, Pic-, into these diluents. The K1,org (= [NaLPic]org/[NaL+]org[Pic-]org) values at the organic (org) phases, such as NB & DCE, were calculated from the relation Kex/Kex± = K1,org. Distribution equilibrium-potential differences (Dfeq) at extraction equilibria were evaluated from the equation Dfeq = -0.05916´(log KD,Pic - constant) at 298 K. Correlations of the above equilibrium constants, particularly Kex±, with Dfeq were examined. Furthermore, the standard formal potentials for Na+ transfers across the interfaces were briefly evaluated from calculated Dfeq, [Na+] and [Pic-]org. The above extraction systems were characterized by K1,org and the complex formation constants of Na+ with L in the org phases.

scholarly journals Regular Associated Solution Model for the Estimation of Heat of Mixing of Binary Liquid Alloys

BIBECHANA ◽  
1970 ◽  
Vol 6 ◽  
pp. 1-8
Author(s):  
D Adhikari ◽  
BP Singh ◽  
IS Jha
Keyword(s):  
Equilibrium Constants ◽  
Pairwise Interaction ◽  
Solution Model ◽  
Heat Of Mixing ◽  
Interaction Energies ◽  
Binary Liquid ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing ◽  
Associated Solution Model ◽  
Associated Solution

We have determined the equilibrium constants and pairwise interaction energies between the species and the complexes of liquid CuSn, AgAl and FeSi, alloys on the basis of regular associated solution model. These parameters are then used to estimate the heat of mixing of each alloy. The observed asymmetry in the heat of mixing of each alloy with respect to concentration is well explained. Key Words: Free energy of mixing; Asymmetry; Binary alloys, interaction energyThe corrected version of this PDF was loaded on 8/12/2010.DOI: 10.3126/bibechana.v6i0.3931BIBECHANA Vol. 6, March 2010 pp.1-8

Formation of CT complexes and electron transfer from excited molecules of anthracene derivatives to methylviologen in aqueous and micellar media

1987 ◽  
Vol 52 (7) ◽  
pp. 1658-1665
Author(s):  
Viktor Řehák ◽  
Jana Boledovičová
Keyword(s):  
Electron Transfer ◽  
Complex Formation ◽  
Fluorescence Quenching ◽  
Rate Constant ◽  
Formation Constants ◽  
Dynamic Quenching ◽  
Micellar Media ◽  
Complex Formation Constants ◽  
Anthracene Derivatives ◽  
Ct Complexes

Disodium 1,5- and 1,8-anthracenedisulphonate (ADS) and 9-acetylanthracene form coloured CT complexes with methylviologen (MV2+) in aqueous and micellar media. The complex formation constants and molar absorptivities were determined by the Benesi-Hildebrandt method. In the fluorescence quenching, its static component plays the major role. The dynamic quenching component is determined by the rate constant of electron transfer from the S1 state of ADS to MV2+.

Standard enthalpies of formation of N,N´-(1,3-phenylene)bis(phthalimide) and N,N´-(1,3-phenylene)bis(phthalimide-5-carboxilic acid)

2021 ◽  
pp. 178861
Author(s):  
Karina Salas-López ◽  
Miguel A. García-Castro ◽  
Patricia Amador ◽  
Ana M. Herrera-González ◽  
Alberto Galicia-Aguilar ◽  
...  
Keyword(s):  
Enthalpies Of Formation ◽  
Standard Enthalpies Of Formation
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