摘要:

AbstractIt has been shown that certain relationships exist between ionization constants. In the light of these relationships the influence of inductive effects upon velocity constants of chemical reactions has been considered. Regularities have been found for reactions involving the side chain of phenyl compounds with meta or pan constituents and indications are given of the Structure of complexes formed as intermediates. The study of inductive effects in a series of biologically active compounds may give some indication of the mode of action: for example, the toxic action of certain phenols towards some micro‐organisms seems to depend upon the formation of hydrogen bond

ISSN:0368-4075    

DOI:10.1002/jctb.5000680901

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractLewisite I, relatively free from lewisites II and III, is readily obtained by passing acetylence into a mixture of arsenious chloride and a solution of mercuric chloride in either 18% hydrochloric acid or saturated sodium 'chloride solution. In the latter case, the arsenious chloride is diluted with carbon terrachloride. Under optimum conditions the yield is 80‐85% calculated on the arsenious chloride consumed. In both cases β‐chlorovinylmercuric chloride m.p. 129°, is an intermediate and this is most readily obtained by passing acetylene into a solution of mercuric chloride in aqucous sodium chloride containing a little hydrochloric

ISSN:0368-4075    

DOI:10.1002/jctb.5000680902

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractLewisite I, containing a small proportion of Lewisite II, is readily obtained in good yield by passing acetylene into a vigorously stirred mixture of arsenious chloride in carbon tetrachloride and a concentrated solution of cuprous chloride in aqueous ethanolamine hydrochloride. The reaction is most conveniently carried out continuously.

ISSN:0368-4075    

DOI:10.1002/jctb.5000680903

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractTwo methods have been evolved for the analysis of crude lewisite and the determination of lewisite I by the acetylene evolution method has also been investigated. Conditions have also been worked out for the estimation of arsenious chloride in crude lewisite by a gravimetric method.

ISSN:0368-4075    

DOI:10.1002/jctb.5000680904

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractLewis and Evans1examined the corrosion of steel produced by drops of 0.001 M sodium chloride solution applied to a film of paint, which had been interrupted by the engraving of a standard scratch line. They found that zinc dust, zinc oxide and a number of lead compounds prevented corrosion at the scratch line. The role of lead compounds has been examined by the author,2and it has been established that inhibition is associated with the formation of lead soaps. In the case of zinc dust it has been shown3that when the zinc dust content of the paint film is sufficiently high, the steel may be protected cathodically. Zinc oxide cannot function in this manner, nor can zinc dust do SO when the paint film contains less than a certain amount.The following investigation has been carried our in order to establish the way in which various zinc pigments inhibit corrosion.

ISSN:0368-4075    

DOI:10.1002/jctb.5000680905

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractMineral oil used for lubricating or greasing purposes by the Baking Industry is absorbed to some degree by the baked product. An analytical method is described for the determination of mineral oils in bread, and the way by which such oils are bound in the bread is discussed. The possible physiological effect of oils so used is considered, as a result of which it has been suggested that bread should not contain mineral oil of chemical purity less than that of Liquid Paraffin B.P., nor should the quantity of oil exceed 0.2%.

ISSN:0368-4075    

DOI:10.1002/jctb.5000680906

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractDiphenylchloroarsine is readily obtainable in good yield, together with small quantities of phyenyldichloroarsine and triphenylarsine, by oxidation of phenylhydrazine with arsenic acid in presence of a suitable catalyst, followed by treatment with hydrochloric acid. Diphenylcyanoarsine can be prepared in excellent yield either by treatment of the chloro‐compound with potassium cyanide or the intermediate diphenylarsenoxide with hydrocyanic aci

ISSN:0368-4075    

DOI:10.1002/jctb.5000680907

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractOptimum conditions have been determined for the preparation of N‐methyldiethanolamine, without serious contamination by higher homologues, by condensation of ethylene oxide with aqueous methylamine:1The conversion of the diol into N‐methyl‐2: 2′‐dichlorodiethylamine has also been inv

ISSN:0368-4075    

DOI:10.1002/jctb.5000680908

出版商:John Wiley&Sons, Ltd    

年代:1949

数据来源: WILEY