摘要:

AbstractWhen indigo is treated with ethoxyoxalyl chloride dissolved in pyridine, diethoxyoxalylindigo is formed. Unlike the yellow oxalylindigo this compound is a red substance, but by heating or by treating the alcoholic solution with ammonia or aniline it is immediately transformed into oxalylindigo. This is a remarkable example of the easy formation of acis‐derivative of indigo. Analogous derivatives can be obtained from indigo‐dianil, but oxalylindigo‐dianil is not yellow, but reddish

ISSN:0165-0513    

DOI:10.1002/recl.19390580502

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractThe action of hydrazine, methylhydrazine and symmetrical and asymmetrical dimethylhydrazines on 1‐chloro‐2:4‐dinitrobenzene, 1:3‐dichloro‐4:5‐dinitrobenzene, 1:3‐dichloro‐4:6‐dinitrobenzene, 1:3‐dibromo‐4:5‐dinitrobenzene, 1:4‐dichloro‐2‐nitrobenzene and 1:4‐dibromo‐2‐nitrobenzene, has been investigated.The compounds obtained in these reactions have been examined as

ISSN:0165-0513    

DOI:10.1002/recl.19390580503

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Eine Reihe von d‐Glutaminaten und 1‐Asparaginaten zweiwertiger Metalle (Cu, Ni, CoII, Cd, Zn, Mn) wurde dargestellt und polarimetrisch sowie photochemisch untersucht. Die auffallenden Löslichkeitsverhältnisse dieser Salze beruhen auf Hydratations ‐ bezw. Dehydratationsvorgängen Eine cis‐trans‐Isomerie ist nicht nachweisbar. Die Annahme einer totalen (doppelten) Aktivität der Salze zweiwertiger Schwermetalle mit aktiven α‐Aminosäuren ist vo

ISSN:0165-0513    

DOI:10.1002/recl.19390580504

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Fortsetzung früherer Untersuchungen über das Verbrennungslicht reiner Metalle und Aluminiumlegierunge

ISSN:0165-0513    

DOI:10.1002/recl.19390580505

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Versuche über die Lichtmenge, Blitzzeit und Lichtausbeute von Streichhölzer

ISSN:0165-0513    

DOI:10.1002/recl.19390580506

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractA cleavage face, (001) face, of galena, lead sulphide, was treated in different ways, e.g. slightly etched with HCl, polished, etc. We have taken an electron diffraction pattern from these different types of surfaces. In a parallel series of experiments NaCl has been crystallized on these surfaces and the result of overgrowth experiments has been watched through the microscope. The information about the nature of the surface, obtained by the first method, electron diffraction, was in most cases confirmed by the latter.

ISSN:0165-0513    

DOI:10.1002/recl.19390580507

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractThe crystal structure of cyanogen iodide has been investigated. The dimensions of the rhombohedral unit cell are: a = 4.44 ± 0.02Å; α = 101°24′ ± 10′. The probable space group

ISSN:0165-0513    

DOI:10.1002/recl.19390580508

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Abstractβ‐Naphthazide, when heated in dry benzene or ligroin solution, decomposes quantitatively into gaseous nitrogen and β‐naphthyl isocyanate. Either the azide or the isocyanate reacts with phenols in boiling ligroin solution to form crystalline urethanes, with sharp melting points, which are suitable derivatives for the identification of phenols. The yield of the product from the reaction is so high that only 10 to 20 mg of the reagent is sufficient to prepare a urethane in sufficient quantity for a melting point determination and an examination of the crystalline form. In this paper, thirty three urethanes from various phenols are desc

ISSN:0165-0513    

DOI:10.1002/recl.19390580509

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Abstractp‐Xenylsemicarbazide, prepared by the condensation ofp‐xenylurea with hydrazine hydrate, was found to be a very good reagent for the preparation of derivatives suitable for the identification of carbonyl compounds. Twenty‐eightp‐xenylsemicarbazones, made by the interaction of the reagent and various types of aldehydes and ketones, are reported in thi

ISSN:0165-0513    

DOI:10.1002/recl.19390580510

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Die maximale Dichte und Kompressibilität von Salzlösungen sind zwei Eigenschaften bei welchen die Ionen qualitativ sich nur teilweise nach der lyotropen Reihe ordnen.Im folgenden wird untersucht, ob trotz des oben Gesagten doch eine quantitative Beziehung zwischen diesen Eigenschaften und den lyotropen Zahlen zu finden is

ISSN:0165-0513    

DOI:10.1002/recl.19390580511

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY