Partial molal volumes of some halobenzenes in carbon tetrachloride

1983 ◽  
Vol 61 (7) ◽  
pp. 1414-1416 ◽  
Author(s):  
Fereidoon Shahidi
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Van Der Waals ◽  
Alkyl Halides ◽  
Substituted Benzenes ◽  
Halogen Atoms ◽  
Partial Molal Volumes ◽  
Molal Volumes

The partial molal volumes at infinite dilution [Formula: see text] for a number of halobenzenes are measured and related to their van der Waals volumes. Results indicate larger volume increments for halogen atoms in halobenzenes than those in alkyl halides. Possible explanations are forwarded. The effect of steric overcrowding in ortho-substituted benzenes on the [Formula: see text] values are evaluated.

Partial molal volumes of organic compounds in carbon tetrachloride. IV. Ketones, alcohols, and ethers

1979 ◽  
Vol 57 (19) ◽  
pp. 2585-2592 ◽  
Author(s):  
John T. Edward ◽  
Patrick G. Farrell ◽  
Fereidoon Shahidi
Keyword(s):  
Carbon Tetrachloride ◽  
Organic Compounds ◽  
Linear Relation ◽  
Reasonable Agreement ◽  
Van Der Waals ◽  
Partial Molal Volumes ◽  
Molal Volumes

The partial molal volumes [Formula: see text] in carbon tetrachloride at 25 °C of 13 ketones, 18 alcohols, and 17 mono- or poly-functional ethers, all acyclic, have been determined. Results are in reasonable agreement with [Formula: see text] calculated from an equation developed previously, using previous parameters plus the following: increments (in mL mol−1) of 8.72 for carbonyl, 6.1 for hydroxyl, 4.4 for oxygen in a monofunctional ether, and 5.8 for oxygen in a polyfunctional ether; decrements δ (in mL mol−1) of −1.68 for [Formula: see text] for [Formula: see text] for [Formula: see text] for [Formula: see text], and −1.93 for [Formula: see text]. The increments for carbonyl and hydroxyl are smaller than the van der Waals volumes of these groups, and indicate some degree of complexation to carbon tetrachloride. Only a roughly linear relation is found between [Formula: see text] of alcohols in water and [Formula: see text] in carbon tetrachloride, possibly because of the intrusion of additional effects such as structure-promotion in water.

Relation between van der Waals and Partial Molal Volumes of Organic Molecules in Water

1975 ◽  
Vol 53 (19) ◽  
pp. 2965-2970 ◽  
Author(s):  
John T. Edward ◽  
Patrick G. Farrell
Keyword(s):  
Organic Molecules ◽  
Van Der Waals ◽  
Polar Compounds ◽  
Total Surface Area ◽  
Polar Group ◽  
Partial Molal Volumes ◽  
Aliphatic Carbon ◽  
Urea Group ◽  
Molal Volumes ◽  
Nonpolar Organic

The partial molal volumes [Formula: see text] of nonpolar organic molecules (i.e. those having more than three aliphatic carbon atoms per polar hydroxyl, ether, amine, amide, or urea group) in water at 25 °C are given by their van der Waals volumes υw plus the additional empty volume provided by an enclosing shell 0.53 Å thick. An equation relates [Formula: see text] to υw More polar compounds (i.e. those having fewer than two or three aliphatic carbon atoms per polar group) have [Formula: see text] smaller than calculated by the equation; the shrinkage in [Formula: see text] from that computed is linearly related to the fraction of the total surface area of the molecule occupied by the polar group.

THE PARTIAL MOLAL VOLUMES OF IONS IN AQUEOUS SOLUTION: I. DEPENDENCE ON CHARGE AND RADIUS

1956 ◽  
Vol 34 (9) ◽  
pp. 1209-1216 ◽  
Author(s):  
A. M. Couture ◽  
K. J. Laidler
Keyword(s):  
Ionic Crystal ◽  
Infinite Dilution ◽  
Hydrogen Ion ◽  
Empirical Equations ◽  
Density Data ◽  
A Value ◽  
Partial Molal Volumes ◽  
Solutions Of Electrolytes ◽  
Molal Volumes ◽  
Charge And Radius

The density data for aqueous solutions of electrolytes have been analyzed, and partial molal volumes at infinite dilution have been calculated. The values are shown to be additive, and a set of volumes for individual ions has been prepared, based arbitrarily on a value of zero for the hydrogen ion. It is shown that for a given value of the charge the volumes vary linearly with the cube of the ionic crystal radii, and for a given radius vary with the first power of the charge. In the case of cations the equation obeyed is[Formula: see text]while for anions[Formula: see text]If the volume of the hydrogen ion is taken as −6 ml. instead of zero the same equation is obeyed for both cations and anions, namely[Formula: see text]The empirical equations are discussed in terms of a simple model for ions in solution.

Partial molal volumes of organic compounds in carbon tetrachloride. V. Cyclic alkanes, ethers, alcohols, ketones, and bromides

1979 ◽  
Vol 57 (22) ◽  
pp. 2892-2894 ◽  
Author(s):  
John T. Edward ◽  
Patrick G. Farrell ◽  
Fereidoon Shahidi
Keyword(s):  
Carbon Tetrachloride ◽  
Organic Compounds ◽  
Partial Molal Volumes ◽  
Cyclic Alkanes ◽  
Polyfunctional Compounds ◽  
Molal Volumes

The partial molal volumes [Formula: see text] or 47 mono- or polycyclic alkanes, ethers, alcohols, ketones, and bromides have been determined in carbon tetrachloride at 25 °C. [Formula: see text] of most of these compounds can be calculated with moderate (±1–2%) accuracy using an equation containing parameters previously developed for acyclic compounds, and an additional cyclization parameter C, which is roughly linear with the number n of atoms in the ring, from n = 3 (C = +5.3 mL mol−1) to n = 10 (C = −21.0 mL mol−1). Substituted cyclohexanols and some polyfunctional compounds had [Formula: see text] considerably lower than calculated.

Partial molal volumes of organic compounds in carbon tetrachloride. 3. Aromatic hydrocarbons: steric effects

1979 ◽  
Vol 44 (6) ◽  
pp. 950-953 ◽  
Author(s):  
Fereidoon Shahidi ◽  
Patrick G. Farrell ◽  
John T. Edward ◽  
Persephone Canonne
Keyword(s):  
Carbon Tetrachloride ◽  
Organic Compounds ◽  
Aromatic Hydrocarbons ◽  
Steric Effects ◽  
Partial Molal Volumes ◽  
Molal Volumes

Deuterium isotope effects on the partial molal volumes of cyclohexane, acetone, and acetonitrile in carbon tetrachloride

1983 ◽  
Vol 61 (12) ◽  
pp. 2684-2687 ◽  
Author(s):  
G. Ronald Brown ◽  
Julian K. Edward ◽  
John T. Edward
Keyword(s):  
Carbon Tetrachloride ◽  
Steric Effect ◽  
Isotope Effects ◽  
Polar Compounds ◽  
Molar Volumes ◽  
Partial Molal Volumes ◽  
Deuterium Isotope Effects ◽  
Molal Volumes

At 25 °C both molar volumes V and partial molal volumes [Formula: see text] in carbon tetrachloride of cyclohexane-d12 and of acetone-d6 are smaller than V and [Formula: see text] of the corresponding protio compounds. However, both V and [Formula: see text] of acetonitrile-d3 are larger than V and [Formula: see text] of acetonitrile-h3, and in solvent cyclohexane [Formula: see text] of acetone-d6 and of acetone-h6 are approximately equal. Apparently deuteration has not only a steric effect, but (in polar compounds) a counter-balancing effect, which may be polar.

Correspondling states correlations for liquid compressibility and partial molal volumes of gases at infinite dilution in liquids

AIChE Journal ◽  
1972 ◽  
Vol 18 (6) ◽  
pp. 1239-1243 ◽  
Author(s):  
S. W. Brelvi ◽  
J. P. O'Connell
Keyword(s):  
Infinite Dilution ◽  
Liquid Compressibility ◽  
Partial Molal Volumes ◽  
Molal Volumes

Partial molal volumes of organic compounds in carbon tetrachloride. 1. Alkanes: conformational effects

1978 ◽  
Vol 82 (21) ◽  
pp. 2310-2313 ◽  
Author(s):  
John T. Edward ◽  
Patrick G. Farrell ◽  
Fereidoon Shahidi
Keyword(s):  
Carbon Tetrachloride ◽  
Organic Compounds ◽  
Conformational Effects ◽  
Partial Molal Volumes ◽  
Molal Volumes

ChemInform Abstract: PARTIAL MOLAL VOLUMES OF ORGANIC COMPOUNDS IN CARBON TETRACHLORIDE. 2. HALOALKANES

1979 ◽  
Vol 10 (20) ◽  
Author(s):  
F. SHAHIDI ◽  
P. G. FARRELL ◽  
J. T. EDWARD
Keyword(s):  
Carbon Tetrachloride ◽  
Organic Compounds ◽  
Partial Molal Volumes ◽  
Molal Volumes
Sign in / Sign up

Export Citation Format

Share Document