“Structure Breaking” Effect of Hydrated Cs+

2004 ◽  
Vol 108 (9) ◽  
pp. 1509-1514 ◽  
Author(s):  
Christian F. Schwenk ◽  
Thomas S. Hofer ◽  
Bernd M. Rode
Keyword(s):  
Breaking Effect ◽  
Structure Breaking

Excess Volumes of Binary Mixtures of Alcohols in Methylcyclohexane

1974 ◽  
Vol 52 (5) ◽  
pp. 788-790 ◽  
Author(s):  
Murari Venkata Prabhakara Rao ◽  
P. Ramachandra Naidu
Keyword(s):  
Binary Mixtures ◽  
Entire Range ◽  
Excess Volumes ◽  
Breaking Effect ◽  
Structure Breaking

Excess volumes of binary mixtures of alcohols in methylcyclohexane have been determined at 30.0 and 40.0 °C, using a modified dilatometer of Brown and Smith. The systems include: (I) 1-propanol – methylcyclohexane, (2) 1-butanol – methylcyclohexane, (3) 1-pentanol–methylcyclohexane, and (4) 1-hexanol–methylcyclohexane. The VE values are found to be positive over the entire range of composition in all the four systems and the values are interpreted on the basis of the structure-breaking effect of methylcyclohexane.

Apparent Molal Volumes and Heat Capacities of Urea and Methyl-Substituted Ureas in H2O and D2O at 25 °C

1974 ◽  
Vol 52 (9) ◽  
pp. 1709-1713 ◽  
Author(s):  
Patrick R. Philip ◽  
Gérald Perron ◽  
Jacques E. Desnoyers
Keyword(s):  
Heat Capacity ◽  
Hydrogen Bonding ◽  
Heat Capacities ◽  
Breaking Effect ◽  
Methyl Substitution ◽  
Apparent Molal Volumes ◽  
Hydrogen Bonding Interactions ◽  
Molal Volumes ◽  
Methylene Group ◽  
Structure Breaking

The apparent molal volumes and heat capacities of urea, 1,1- and 1,3-dimethylurea, and tetramethylurea were measured in H2O and D2O at 25 °C. From these data, urea–water interactions seem to cause an overall structure-breaking effect and the substituted ureas, an overall structure-making effect. The effect of the hydrogen-bonding interactions to the volume and heat capacity seems to be small compared with the intrinsic and hydrophobic contributions of a methylene group, as reflected by the isotope effect. Furthermore, transfer values seem to show a significant specificity to the degree and position of methyl substitution.

Isentropic Compressibilities of Butylamine+n-Alkane at 303.15 and 313.15 K

1979 ◽  
Vol 32 (3) ◽  
pp. 471 ◽  
Author(s):  
M Sreenivasulu ◽  
PR Naidu
Keyword(s):  
Chain Length ◽  
Binary Mixtures ◽  
Breaking Effect ◽  
Isentropic Compressibilities ◽  
Structure Breaking

Isentropic compressibilities of binary mixtures of butylamine + hexane, butylamine + heptane, and butylamine + octane were determined at 303.15 and 313.15 K. The three mixtures exhibit positive deviations in compressibility. This is ascribed to a structure-breaking effect of n-alkanes. The deviation becomes more positive with increase in chain length of n-alkanes and with increase in temperature.

Dielectric Spectroscopy of Binary Liquid Mixtures of Methanol with Morpholine, Pyrrolidine and some of their Derivatives

1997 ◽  
Vol 52 (8-9) ◽  
pp. 675-677
Author(s):  
V. K. Syal ◽  
U. Becker ◽  
R. Elsebrock ◽  
M. Stockhausen
Keyword(s):  
Dielectric Spectroscopy ◽  
Composition Dependence ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
The Other ◽  
Breaking Effect ◽  
Dielectric Spectra ◽  
Binary Liquid ◽  
Relaxation Parameters ◽  
Structure Breaking

Abstract Dielectric spectra (up to 72 GHz) have been measured at 20 °C for mixtures of methanol and one of the following substances: morpholine, N-methyl morpholine, N-cyano morpholine, pyrrolidine and N-cyano pyrrolidine. The composition dependence of the relaxation parameters shows close similarities for the morpholines and, on the other hand, for the pyrrolidines, which indicates that a structure breaking effect on methanol is exerted by the former but not by the latter group of substances.

A Study of the Structure of the Complexes of Glycine and Glycylglycine with Cu(II) in Solution, Based on Viscosity Measurements

1974 ◽  
Vol 29 (1-2) ◽  
pp. 83-85
Author(s):  
P. U. Sakellaridis ◽  
E. K. Karageorgopoulos ◽  
J. M. Tsangaris
Keyword(s):  
Water Structure ◽  
Breaking Effect ◽  
Temperature Range ◽  
Viscosity Measurements ◽  
Solute Interactions ◽  
Structure Breaking

In the relation ηr = 1 + Bm + Dm2 the Β values of the complexes bis(glycinato)Cu(II) and (glycylglycinato)Cu(II) between 10 and 40°C indicate that these complexes are hydrated by two molecules of water at their carboxyl oxygens. Large values of D indicate solute-solute interactions via the axial positions of the cupric square microsymmetry, as the molecules are moving in the liquid streamlines. For both complexes dB/dT was found to be positive in the examined temperature range. This presumably indicates that the examined complexes have a structure breaking effect on the water structure.

Sign in / Sign up

Export Citation Format

Share Document