T S Wheeler
Articles written in Proceedings – Section A
Volume 1 Issue 2 August 1934 pp 105-114
The theory outlined in Part 1 (
Volume 1 Issue 11 May 1935 pp 795-814
The theory which has been discussed in this and preceding papers regards a liquid as being composed of a number of force centres or molecules each vibrating within an associated spherical space kept free from other molecules by the thermal motion of the occupying molecule. The transitional motion of the molecules through the liquid is assumed to be small compared with the vibratory motion. Each molecule attracts and repels the others with forces varying as inverse powers of the distance. The diameter of a spherical space is calculated, assuming that these spaces are closely packed, so that it is taken to vary with temperature. In the calculation of properties, such as L
Volume 1 Issue 12 June 1935 pp 905-914
A simple method for the calculation of the potential of cubic crystal lattices, has been applied to the calculation of the electrostatic potential of cuprite.
Volume 2 Issue 1 July 1935 pp 1-9
Volume 2 Issue 3 September 1935 pp 265-278
(1) The kinetics of the reaction between benzyl chloride and solid silver nitrate has been studied in the absence of solvents and diluents.
(2) The reaction is independent of the amount of benzyl chloride, but is proportional to the surface of silver nitrate present.
(3) The reaction has been studied with particles of three different sizes, and it has been shown that all the experimental results can be reproduced by the kinetic equation derived on the assumption that the rate of reaction depends only on the surface of silver nitrate present.
(4) The velocity of reaction is independent of the speed of shaking.
(5) Water inhibits the reaction; the effect of 0·18% by weight of benzyl chloride taken is marked and this effect increases with the amount of water added.
Volume 2 Issue 5 November 1935 pp 438-451
Volume 2 Issue 5 November 1935 pp 483-489
Inert organic solvents, when added to a mixture of solid potassium cyanide and benzaldehyde, precipitate a portion of the small quantity of potassium cyanide dissolved in the benzaldehyde, and thus cause the homogeneous autocatalytic reaction to proceed more slowly. They do not affect the heterogeneous reaction.
Hydroxy-compounds accelerate the benzoin reaction and the accelerating effect increases with the number of hydroxy groups.
Volume 2 Issue 6 December 1935 pp 605-614
It is shown that sulphur, carbon disulphide, thiobenzaldehyde, iodine and quinone act as inhibitors in the heterogeneous reaction between solid potassium cyanide and pure benzaldehyde.
The action is due to the adsorption of the inhibitor on the surface of the solid potassium cyanide.
Inhibition can be detected with benzaldehyde containing one part in ten million of quinone.
Crude benzaldehyde can be purified for use in the benzoin reaction by keeping it at room temperature in 50 gm.-lots in an atmosphere of nitrogen in contact with 0.1 gm. of potassium cyanide.
Volume 2 Issue 6 December 1935 pp 637-645
A method is described for measuring the adsorption of soap by cotton under standard conditions. Evidence is brought forward to show that the adsorption figure may be a measure of the detergent action of soap solutions.
Volume 4 Issue 1 July 1936 pp 91-96
The kinetics of the reaction between benzyl chloride and solid silver nitrate has been studied in the presence of dry ethyl ether, chloroform and carbon tetrachloride.
All these diluents inhibit the reaction, the effect of ether being most marked.
The rate of reaction is proportional to the surface of silver nitrate present; it is independent of the initial amount of a given mixture of benzyl chloride and diluent taken.
The experimental results can be reproduced by a kinetic equation based on the assumption that the rate of reaction for a given initial mixture of benzyl chloride and diluent depends only on the surface of the silver nitrate present.
The effect of the diluent may be due to the adsorption on the surface of the silver nitrate.
Volume 4 Issue 3 September 1936 pp 291-297
Volume 4 Issue 3 September 1936 pp 298-302
Volume 7 Issue 6 June 1938 pp 411-415
The kinetics of the reaction between benzyl chloride and anhydrous formic acid have been examined at 80, 90 and 100°. The velocity of the reaction decreases with increase in concentration of benzyl chloride in formic acid. The observed rate of the reaction is much slower than that calculated from the observed heat of activation; a possible explanation of the tardiness activated from present only in traces.
Volume 8 Issue 2 August 1938 pp 61-64
Continuation of the investigation of the benzoin reaction between pure potassium cyanide and pure benzaldehyde in the absence of solvents and diluents has shown that between 80° C. and 110° C. the rate of the fast homogeneous autocatalytic reaction remains unaltered; the slow heterogeneous reaction has its rate approximately doubled for each 10° C. rise in temperature.