摘要:

AbstractThe molal steady‐state temperature differences δ for a number of solvents have been determined by theHill‐Baldestechnique, using a precision thermistor bridge. The values of δ obtained in the present investigation as well as those available in the literature have been explained on the basis of the theory of evaporation of droplets after introducing a thermal efficiency factor, which is characteristic of the experimental method employed. The application of this technique for the determination of molecular weights in solution is also disc

ISSN:0165-0513    

DOI:10.1002/recl.19540731002

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractAt −31° cyclooctatetraene absorbs 3.5 moles of ozone. Among the products of the ozonolysis of cyclooctatetraene, ethane‐1,1,2,2‐tetracarboxylic acid and succinic acid were found. The results may be interpreted either in terms of an equilibrium between cyclooctatetraene and bicyclo‐(4.2.0)‐octatriene or in terms of a reaction mechanism analogous to the one postulated byFriessandBoekelheide10) for haloge

ISSN:0165-0513    

DOI:10.1002/recl.19540731003

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractNitration of 2,6‐dimethyl‐(p‐toluenesulpho) anilide or 2,6‐dimethyl‐benzenesulphoanilide in aqueous acetic acid, followed by deacylation, gives 2,6‐dimethyl‐4‐nitroaniline in yields of 80‐90%. These and other procedures are discussed.The rate of deacylation of 2,6‐dimethyl‐4‐nitroacetanilide in sodium methoxide solution is in agreement with the considerable steric inhibition of me

ISSN:0165-0513    

DOI:10.1002/recl.19540731004

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractThe preparation of a number of benzene derivatives containing the acetylamino and the methylsulphonyl group as substituents is described. Proofs for the constitution of the compounds obtained are furnished.

ISSN:0165-0513    

DOI:10.1002/recl.19540731005

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractFor the glycerol‐monoiodohydrins of m.p. 48‐49° and 53.5‐54.5° new methods of preparation are described. The last‐mentioned compound has thus become reasonably accessible for the first time. The statements in the literature as to the constitution of the first‐mentioned compound are discussed. Unambiguous evidence for the constitution of the two compounds is furnished: the compound of m.p. 48‐49° is the α‐isomer, that of m.p. 53.5

ISSN:0165-0513    

DOI:10.1002/recl.19540731006

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractStarting from the rate constants of the alkaline hydrolysis of methylmeta‐ andpara‐N‐oxide‐dimethylamino benzoate and with the aid of data of various nature from the literature, the generalization is arrived at that as a rule the influence of the negative inductive effect from themetaand from theparaposition differs little, with some tendency towards predominance of this effect from themetaposition.Some applications of this generalization are di

ISSN:0165-0513    

DOI:10.1002/recl.19540731007

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractManganese dioxide, prepared by electro‐deposition on a platinum substrate from a manganous salt solution, proved to be a suitable electrode combination for detecting the end point in neutralization reaction

ISSN:0165-0513    

DOI:10.1002/recl.19540731008

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19540731009

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19540731010

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY

摘要:

AbstractThe rate of absorption of carbon dioxide in the liquid phase in a calorimetric bomb has been determined under conditions prevailing in rotating‐bomb calorimetry for compounds containing C, H, O, halogen or C, H, O, S. In order to ensure complete equilibration during the time of rotation, the following procedure is suggested for rotation of the bomb:The bomb should be rotated end‐over‐end at a speed of 10‐12 rpm. During the rotation period the bomb should also make at least three complete axial turns, either continuously or intermittently. The length of the rotation period depends on the amount of bomb liquid. With approximately 10 ml of bomb liquid the rotation period should preferably be 3 minutes, although 2 minutes will be sufficient in most cases. With 30 ml of bomb liquid the rotation period should be at least 3 minutes and preferably 4.5

ISSN:0165-0513    

DOI:10.1002/recl.19540731011

出版商:WILEY‐VCH Verlag    

年代:1954

数据来源: WILEY