Studies of molecular complexes of some π- and n-donors with iodine by the constant activity method

1981 ◽  
Vol 59 (8) ◽  
pp. 1212-1217 ◽  
Author(s):  
Ram Adhar Sing ◽  
Subray N. Bhat
Keyword(s):  
Carbon Tetrachloride ◽  
Spectral Methods ◽  
Molecular Complexes ◽  
Association Constants ◽  
Heats Of Formation ◽  
Activity Method ◽  
Iodine Complexes

The iodine complexes of naphthalene, biphenyl, hexamethylbenzene, aniline, and o-toluidine in carbon tetrachloride were studied by using the constant activity method. The association constants and the heats of formation of the complexes were determined and the results are compared with those obtained by using conventional spectral methods. The blue-shifted iodine band maxima were determined directly.

The theory of condensation of supersaturated vapours in the absence of ions

1953 ◽  
Vol 220 (1140) ◽  
pp. 132-141 ◽  
Keyword(s):  
Carbon Tetrachloride ◽  
Methyl Alcohol ◽  
Rapid Heating ◽  
Molecular Complexes ◽  
Cloud Chamber ◽  
Appreciable Amount ◽  
Liquid Droplets ◽  
Critical Supersaturation ◽  
Chamber Measurements ◽  
Alcohol Benzene

A brief review of the condensation theory of Becker & Döring (1935) and Frenkel (1946) is given. It is shown that the theory is subject to the limitation that it assumes that small molecular complexes behave like liquid droplets. This is not the case for complexes consisting of a few molecules only, so that the rate of condensation expected from the theory may be altered by an appreciable amount. The Becker & Döring expression for critical supersaturation is compared with the cloud-chamber measurements of Volmer & Flood (1934), taking into account the rapid heating of the gas after the fast expansion. It is found to be in approximate agreement for water and some of the alcohols, but methyl alcohol, benzene and carbon tetrachloride show large discrepancies. More measurements of critical supersaturations are needed.

Hydrogen bonding in chloroform-thioether systems: An N.M.R. spectroscopic study

1974 ◽  
Vol 27 (2) ◽  
pp. 287 ◽  
Author(s):  
KW Jolley ◽  
LM Hughes ◽  
ID Watson
Keyword(s):  
Hydrogen Bonding ◽  
Spectroscopic Study ◽  
Molecular Complexes ◽  
Association Constants ◽  
Enthalpies Of Formation ◽  
Dimethyl Sulphide ◽  
Excess Enthalpies ◽  
Temperature Range ◽  
Enthalpies Of Mixing ◽  
The Ideal

The association constants of molecular complexes of chloroform with dimethyl sulphide, diethyl sulphide, tetrahydrothiophen and thiophen have been obtained by the use of N.M.R. spectroscopy over a temperature range from -50 to +50�C. The enthalpies of formation have been found from these results and used in the ideal associated model to predict the excess enthalpies of mixing.

Sign in / Sign up

Export Citation Format

Share Document