摘要:

AbstractDank den bei der Untersuchung einiger aetherischen Öle der Rhizome erhaltenen Ergebnissen konnten in den Blattölen von Languasarten, obwohl nur geringe Mengen zur Verfügung standen, verschiedene Bestandteile identifiziert werden. Es ergab sich, dass die Zusammensetzung des Blattöls viel übereinstimmung mit der des Rhizomöles derselben Pflanze zeigt.Nachgewiesen werden: In dem Blattöl von Languas Romburghiana (Val) α‐Pinen, β‐Pinen, Cineol, Campher, Borneol und Methycinnamat; in dem Blattöl von Languas speciosaSmallα‐Pinen, β‐Pinen, Cineol und ein Zimtsäureester, wahrscheinlich Methylcinnamat; in dem Blattöl von Languas SchumannianaSasakiCampher, in dem Blattöl von Languas malaccensisMerr.ausser den bereits von van Romburgh nachgewiesenen Bestandteilen (d‐α‐Pinen und Methyc

ISSN:0165-0513    

DOI:10.1002/recl.19370560502

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY

摘要:

AbstractThe following have been made by the action of hydrazine and/or methyl‐hydrazine on 1: 3‐dichloro‐4: 6‐dinitrobenzene in alcoholic solution: 3‐chloro‐4: 6‐dinitrophenylhydrazine, α‐(3‐chloro‐4: 6‐dinitrophenyl)‐α‐methylhydrazino)‐4: 6‐dinitrobenzene and l‐hydrazino‐3‐(α‐methylhydrazino)‐4: 6‐dinitrobenzene.A number of derivatives of each of the above mentioned compounds were prepared by condensation with various aldehydes and ketones.A start has also been made with an investigation on the oxidation of substituted phenylene di‐(meth

ISSN:0165-0513    

DOI:10.1002/recl.19370560503

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY

摘要:

AbstractIntroduction.A new apparatus, the film reactor, has been used for the preparation of a series of α‐chloro‐ethers, thus making this group of compounds easily obtainable. Substituted ethers were prepared from the α‐chloro‐ethers. Details of these preparations (yields and properties) are

ISSN:0165-0513    

DOI:10.1002/recl.19370560504

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY

摘要:

AbstractThe author investigated a number of quaternary and ternary explosion regions of gas (gas and vapour) mixtures in which ethylene and air throughout were two of the components. These gases were combined in the quaternary systems with hydrogen and carbon monoxide, hydrogen and carbon dioxide, nitrogen and carbon dioxide; in the ternary systems with vapours of ethylene chloride, ethylene bromide andn‐butyl bromide. It is considered whether in the limit mixtures of these systems Le Chatelier's law and formula was satisfied; in connection with this consideration the result of the investigations is summarized in graphs and tables. A closed explosion region was found in the system C2H4‐air‐H2‐CO2. Moreover a description is given of an apparatus in which a part of the experiments was carr

ISSN:0165-0513    

DOI:10.1002/recl.19370560505

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY

摘要:

AbstractThe aim of this investigation on the oxidation of glycerol, was to discover a method of preparing dihydroxyacetone in higher yields than obtained by E. Fischer and J. TafelBer. 20, 3384 (1887).) by purely chemical means. The literature on the purely chemical oxidation of glycerol is very voluminousSee dissertation, pp. 19, 20 and 21.).The oxidation of glycerol was examined with hydrogen peroxide and ferrous sulphate, with alkaline hypochlorite solution using cobalt acetate as catalyst, with bleaching powder and cobalt acetate and with bromine and soda. The latter method afforded crystallised dihydroxyacetone. Various hydrazones and osazones of this compound were prepared. Some of the osazones of dihydroxyacetone could only be obtained by first oxidising it to hydroxypyruvic aldehyde and reacting the latter with the appropriate substituted hydrazines.Various osazones of glyoxal were also prepared.

ISSN:0165-0513    

DOI:10.1002/recl.19370560506

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY

摘要:

AbstractLa réaction entre le tétra‐(bromométhyl)‐méthane et le séléniure potassique donne avec un bon rendement le 2,6‐diséléna‐4‐spiroheptane (II), tandis que l'anneau simple du sélénacyclobutane (3 C et 1 Se) s'obtient difficilement. La cyclisation de l'1,3‐dibromopropane par le séléniure potassique est facilitée également par la présence d'un autre anneau (cyclohexane) ou de deux groupes méthyliques fixés à l'atome central. L'atome de sélénium des sélénacyclobutanes fixe les sels mercuriques, l'oxygène (sélénones) et l'iode, tandis que l'anneau s'ouvre sous l'influence de chl

ISSN:0165-0513    

DOI:10.1002/recl.19370560507

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19370560501

出版商:WILEY‐VCH Verlag    

年代:1937

数据来源: WILEY