摘要:

AbstractThe reaction of kojic acid 5‐mono‐ and α, 5‐diethers with hydrazine hydrate has been found to give the corresponding 1‐amino‐4‐pyridones, as well as one of the two possible pyrazole derivatives. This result was to be expected since, on etherification, the formation of the previously(2) described pyridazones w

ISSN:0018-019X    

DOI:10.1002/hlca.19600430202

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractEine Membranpolarographie wurde entwickelt. An den idealen Porenmembranen von Aluminiumoxyd‐Deckschichten wird die für die Diffusion wirksame Porenfläche ermittelt. Die Möglichkeiten, Diffusionsprobleme in Porenelektrolyten zu untersuchen, werden aufged

ISSN:0018-019X    

DOI:10.1002/hlca.19600430203

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractThe radiation stability and the thermal stability of ordinary (C12H10) and deutero (C12D10) diphenyl have been measured and compared. Deuterodiphenyl is more stable than the ordinary diphenyl by a factor of about 2, for pyrolysis at 460°C as well as for radiolysis at 30–40°C and at 310°C. This difference is of practical importance for the consideration of deutero‐diphenyl as coolant for power re

ISSN:0018-019X    

DOI:10.1002/hlca.19600430204

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractThe gas‐chromatogram for the reacting systemA→Bhas been derived from the cell model of non‐ideal, linear chromatography, assuming first‐order k

ISSN:0018-019X    

DOI:10.1002/hlca.19600430205

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractIrradiation of 3‐keto‐10β,17β‐diacetoxy‐Δ1,4‐estradiene (I) with monochromatic light of 254 mμ yielded 17‐O‐acetyl‐estradiol (II) a

ISSN:0018-019X    

DOI:10.1002/hlca.19600430206

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractZwecks Klarstellung der Vorgänge, welch sich bei der Erzeugung von mechanischer aus chemischer Energie durch Kontraktion von aus Polyvinylalkohol und Polyacrylsäure bestehenden homogenen Lamellen abspielen, werden, ausser der Herstellung, eine Reihe von Eigenschaften dieser Folien beschriebe

ISSN:0018-019X    

DOI:10.1002/hlca.19600430207

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractThe spectroscopic properties and the basicity of p‐trimethylammonium‐phenylazo‐azulene support the conclusions drawn in a previous paper concerning the influence of −M and +M active substituents on the spectrum of phenyl‐azo‐azulene. They also verify the structure previously assigned to the protonated p‐dimethylamino‐phenyl‐azo‐azulene. A σp‐value of 0·66 ± 0·03 for the trimethylammonium subs

ISSN:0018-019X    

DOI:10.1002/hlca.19600430208

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractA study of the reactions involved in the preparation of 16α‐methyl‐17α‐hydroxy‐21‐acetoxy‐Δ1;4;9,11‐pregnatriene‐3, 20‐dione (V) from the corresponding 11α‐sulfonyloxy‐2,4‐dibromo‐allopregnane‐3,20‐diones led to a process in which all three substituents in 2‐, 4‐ and 11α‐positions are eliminated simultaneously. 2‐Halogen‐Δ4;9,11‐pregnadiene‐3,20‐diones were formed as by‐p

ISSN:0018-019X    

DOI:10.1002/hlca.19600430209

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

AbstractA method of the time‐lag type for determining diffusion coefficients is described. The method operates with radioactively (e.g.with14C) tagged diffusing substances and with diffusion media which are thin membranes (e. g.made of high polymeric substances

ISSN:0018-019X    

DOI:10.1002/hlca.19600430210

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY

摘要:

Abstract1‐Hydrazinophthalazine reacts with molecular oxygen in the presence of Fe2+to give a dimeric oxydation product with tetrazane structure, which forms a deep red coordination compound with Fe2+. The rate of the reaction depends on the concentration of a primarely formed FeII‐1‐Hydrazinophthalazine complex, which suggests autoxydation in the coordination sphere of

ISSN:0018-019X    

DOI:10.1002/hlca.19600430211

出版商:WILEY‐VCH Verlag GmbH    

年代:1960

数据来源: WILEY