摘要:

AbstractWhen dimedone is reduced catalytically in 96% ethanol containing 1% hydrogen chloride in solution and with platinum (according to Adams) as a catalyst, there is formed about 58% of the theoretical amount of 3, 3‐dimethylcyclohexanol‐1 and 10% of the theoretical amount of 1, 1‐dimethylcycloh

ISSN:0165-0513    

DOI:10.1002/recl.19410600802

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractZur weiteren Prüfung der in früheren Mitteilungen gegebenen Formulierung der gelben und blauen Nickelkomplexsalze mit Stilbendiamin und anderen Verbindungen wurde eine grössere Zahl von Nickelverbindungen mit Monoaminen, Diaminen, Amidoaldiminen, Oxyaldiminen, Schiffschen Basen und Oxyazobenzen z.T. neu dargestellt und ihr magnetisches Verhalten untersucht. Die Beobachtungsergebnisse werden diskutiert. Eine völlig befriedigende Formulierung scheint nur vom Standpunkte der wellenmechanischen Theorie möglich zu

ISSN:0165-0513    

DOI:10.1002/recl.19410600803

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractThe cohesion forces of molecules with an asymmetric distribution of the electrical charge depends on this asymmetry; the dipole moment is not a suitable quantity for the description of cohesion forces, but some other quantity depending on the distance of the charges from the surface.In order to obtain the values of this quantity for a number of molecules, many data on heat of evaporation and heat of mixing are necessary. Therefore we have measured the heat of mixing of chloroform, pentachloroethane and methyl chloroform with ethyl ether at infinite dilution, both of the ether and of the chloro‐alkane. The results confirm the above consideration

ISSN:0165-0513    

DOI:10.1002/recl.19410600804

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractThe crystal structure of adipic acid has been fully determined. Cell dimensions:a= 10.07,b= 5.16,c= 10.00 Å, β = 137°5′.Space groupC2h, ‐P21/a. The approximately flat molecules have a centre of symmetry and are stretched along thecaxis. The atomic positions are derived from two projections of the electronic density. The interatomic distances are dis

ISSN:0165-0513    

DOI:10.1002/recl.19410600805

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractThe properties of suspensions of finely ground materials in various dispersion media, as a function of their degree of colloid chemical stability, are discussed. Special attention is given to unstable suspensions showing a phenomenon similar to coacervation (found with lyophilic colloids), and to stable suspensions with dilatant sediments.

ISSN:0165-0513    

DOI:10.1002/recl.19410600806

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

摘要:

AbstractThe electrical double layer at the surface of particles of oxidic substances (such as quartz, rutile, zirconium oxide) is studied:a.by means of observations with suspensions of these substances in water, alcohols, acetone, or solutions of electrolytes in these liquids, andb.by means of electroendosmosis through membranes in these liquids. The double layer is caused by ions originating from the materials involved. H+ and OH− are potential‐determining. The zero point of the charge depends closely on the particle size: as in the case of Agl (Kruyt and Julien), large particles are more negative than smaller partic

ISSN:0165-0513    

DOI:10.1002/recl.19410600807

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19410600801

出版商:WILEY‐VCH Verlag    

年代:1941

数据来源: WILEY