摘要:

AbstractL'iodure de méthyle réagissant sur le dérivé argentique du bis‐méthylsulfonyl‐nitrométhane fixe un groupe méthyle sur l'atome de carbone central. La structure du produit résulte de l'hydrolyse et de la pipéridinolyse, qui s'accomplissent sans retard à la température ambiante et qui, en expulsant un groupe méthylsulfonyle, conduisent au 1‐méthylsulfonyl‐1‐nitro‐éthane; la synthèse de ce dernier composé à partir du 1‐bromo‐1‐nitro‐éthane confirme la structure donnée:\documentclass{article}\pagestyle{empty}\begin{document}$$ ({\rm CH}_3 {\rm SO}_2 )_2 {\rm C}({\rm CH}_3 )({\rm NO}_2 ) \to {\rm CH}_3 {\rm SO}_3 {\rm CH}({\rm CH}_3 )({\rm NO}_2 ) \leftarrow {\rm BrCH}({\rm

ISSN:0165-0513    

DOI:10.1002/recl.19520710802

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractWhereas 4‐nitropyridine‐N‐oxide is very stable towards dilute solutions of acids in water, its nitro‐group can be replaced by hydroxyl in a quick reaction by treating this substance with an alkaline solution of hydrogen peroxide in water at a temperature not surpassing 50°. This remarkable substitution reaction proceeds also when other 4‐substituted derivatives of pyridine‐N‐oxide and 4‐nitropyridine are reacted with

ISSN:0165-0513    

DOI:10.1002/recl.19520710803

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractConclusive evidence is presented for the structure of the compound C19H18O, obtained as a by‐product in the reaction of indene with formaldehyd

ISSN:0165-0513    

DOI:10.1002/recl.19520710804

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractA rapid method for the determination of60Co in biological material is proposed. After wet ashing of the organic substances with nitric acid and hydrogen peroxide60Co is precipitated in the presence of a large excess of59Co as potassium cobaltinitrite. The latter is collected on a filter paper. The amount of60Co present in the precipitate is measured with the help of a Geiger‐Müller tube, comparing the counts registered by the scaler with the counts obtained using a precipitate of potassium cobaltinitrite containing a known amount of60

ISSN:0165-0513    

DOI:10.1002/recl.19520710805

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractThe velocities of the reactions of ozone with a number of benzene derivatives were measured.The reactivity in various series of benzene derivatives proceeds as follows:Isopropyl benzene reacts abnormally rapidly with ozone; it is probable that here, in addition to disruption of the benzene nucleus, other reactions take place; secondary butyl benzene does not show this different behaviour.Anisole reacts very rapidly with ozone so as to form a triozonide. The formation of a triozonide was also demonstrated with regard too‐xylene and chlorobenzene.These results confirm the similarity in mechanism between the addition of ozone and the electrophilic substitution reactions, established on an earlier occasionPart I: H. Boer and F. L. J. Sixma, Rec. trav. chim.70, 997 (1951); Part II: F. L. J. Sixma, H. Boer and J. P. Wibaut, Rec. trav. chim.70, 1005 (1951)

ISSN:0165-0513    

DOI:10.1002/recl.19520710806

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractThe preparation of a compound corresponding to the formula N2O5. 3 SO3is given. Neither in the manner of preparation described byPictetandKarl, nor in other way was a stable compound of composition N2O5. 4 SO3obtained. The Raman spectrum of solid N2O5. 3 SO3and of a solid preparation of the average composition N2O4. 3 SO3are determined. Herefrom it may be concluded that N2O5. 3 SO3has to be considered as (NO2+)2. S3O10−−, whereas the product of formula N2O4. 3 SO3contains NO2+ and NO+ions besides the same negative ions S3O1

ISSN:0165-0513    

DOI:10.1002/recl.19520710807

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractDie vorliegende Arbeit beschäftigt sich mit der Darstellung von bisher nicht beschriebenen höheren Homologen der Dehydracetsäure und des Triacetsäure‐lactons. Diese Verbindungen zeigen antibakterielle Wirkungen, welche ein näheres Studium wünschenswert erscheinen

ISSN:0165-0513    

DOI:10.1002/recl.19520710808

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractImproved directions are given for the preparation of an ethereal solution of 3‐pyridylmagnesium bromide. Starting from this compound, the following pyridine derivatives are prepared: 1‐(pyridyl‐3)‐heptene‐1, methyl‐(pyridyl‐3)‐ketone, (pyridyl‐3)‐methanal acetal, 3‐(pyridyl‐3)‐propene, and 3‐isobutenyl pyridine. By the oxidation of the latter substance, (pyr

ISSN:0165-0513    

DOI:10.1002/recl.19520710809

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractFrom U.V. absorption spectra the equilibrium constants were determined for the formation of complexes of iodine with diisobutylene, (CH3)2C = CHC(CH3)3: Kx= 3.7;cis‐dichloroethane, Kx= 0.25; trichloroethene, Kx= 0.19 and tetrachloroethene, Kx= 0.11, as active components inn‐hexane as a solvent. The relation of the tendency towards association with the double bond character is stres

ISSN:0165-0513    

DOI:10.1002/recl.19520710810

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY

摘要:

AbstractThe photochemical reduction of various quinones and dyes by water in the presence of chloroplasts was studied by measurement of the redox potential during illumination. Whether this Hill reaction will proceed to a measurable degree appears to be determined by the standard potential of the redox substance. With systems having a standard potential of about 40 millivoltsRedox potentials in this paper are given with reference to the normal hydrogen electrode at pH = 6.5, and if possible at a temperature of 16° C.or lower, no reduction was observed

ISSN:0165-0513    

DOI:10.1002/recl.19520710811

出版商:WILEY‐VCH Verlag    

年代:1952

数据来源: WILEY