Volume 24, Issue 3, May 1995
Index of content:
Critical Review of Rate Constants for Reactions of Transients from Metal Ions and Metal Complexes in Aqueous Solution24(1995); http://dx.doi.org/10.1063/1.555966View Description Hide Description
Kinetic data for transient metal species in aqueous solution have been critically reviewed. The compilation covers over 2000 measurements of rate constants involving 660 metal ions and metal complexes from Groups 4‐15; lanthanides and actinides are not included. Most of the data have been obtained by the methods of pulse radiolysis or flash photolysis. Data have been collected from 500 publications through 1993.
24(1995); http://dx.doi.org/10.1063/1.555962View Description Hide Description
The available structural parameters, fundamental frequencies and enthalpies of formation for thiirane, thiirene, thietane, 2H‐thiete, 1,2‐dithiete, tetrahydrothiophene, 2,3‐dihydrothiophene, 2,5‐dihydrothiophene, thiophene, 1,2‐dithiolane, 1,3‐dithiolane, 1,2.4‐trithiolane, tetrahydro‐2H‐thiopyran, 5,6‐dihydro‐2H‐thiopyran, 1,3‐dithiane, 1,4‐dithiane, 1,4‐dithiin, 1,3,5‐trithiane, thiepane and 1,3,5,7‐tetrathiocane were critically evaluated and recommended values were selected. Molecular constants and enthalpies of formation for some of the molecules were estimated, as experimental values for these compounds are not available. Using the rigid‐rotor harmonic‐oscillator approximation, this information was used to calculate the chemical thermodynamic functions, C p ○, S°, −(G°−H 0 ○)/T, H°−H 0 ○, and the properties of formation, Δ f H°, Δ f G°, log K f ○, to 1500 K in the ideal gas state at a pressure of 1 bar. The contributions to the thermodynamic properties of compounds having inversion motion (thietane, 2,3‐ and 2,5‐dihydrothiophene) or pseudo‐rotation (tetrahydrothiophene) have been computed by employing a partition function formed by the summation of the inversional or pseudo‐rotational energy levels. These energy levels have been calculated by solving the wave equation using appropriate potential functions. The calculated values of the thermodynamic functions are compared with those reported in other works. Comparison with experimental data, where such are available, is also presented. The thermodynamic properties for twelve of the compounds are reported for the first time.
24(1995); http://dx.doi.org/10.1063/1.555963View Description Hide Description
New experimental data on the thermal conductivity of liquid water along the saturation line have been obtained recently, using the bare and coated transient hot wire technique, with high accuracy. The quality of the data is such that new standard reference values can be proposed with confidence limits of 0.7% at a 95% confidence level. These data and the correlation herein presented revise a previous correlation endorsed by IUPAC.