摘要:

Les points de fusion de ces esters presentent une oscillation nette. Les termes pairs, depuis l'oxalate jusqu'au sébacinate, sont cristallisés et les termes impairs sont liquides. L'oxalate de butyle tertiaire a les propriétés des “molécules rem

ISSN:0165-0513    

DOI:10.1002/recl.19390581202

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractWhen a solution of bis‐(4‐methoxyphenyl)‐chloromethane is treated in an indifferent atmosphere with molecular silver, a transient red colour is produced in the solution.At the end of the reaction the solution is colourless andsymm. tetra‐(4‐methoxyphenyl)‐ethane can be isolated in a quantitative yield.When the removal of halogen is carried out in an atmosphere of oxygen, a red coloration occurs initially but at the end of the reaction the colour is orange yellow to pale brown.4. 4′‐Dimethoxybenzophenone and anisaldehyde can be isolated from the reaction mixture and 1‐hydroxy‐4‐methoxybenzene is probably present also.Nitric oxide can also remove the bis‐(4‐methoxyphenyl)‐methyl radicals initially produced. In this case, only 4. 4′‐dimethoxybenzophenone could be isolated along with somesymm.

ISSN:0165-0513    

DOI:10.1002/recl.19390581203

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractWhen oxygen is excluded, the interaction of molecular silver on diphenylchloromethane dissolved in benzene gives a quantitative yield ofsymm.‐tetraphenylethane.If this reaction is carried out with shaking in an atmosphere of oxygen only traces of the ethane can be isolated from the reaction mixture.The diphenylmethyl radicals, initially formed by dehalogenation, are removed by the oxygen.The reaction products obtained in this case, namely, di‐(diphenylmethyl) ether, benzophenone and diphenylmethanol, may be considered as the decomposition products of a peroxide formed initially.No coloration is observed in the reaction leading tosymm.‐tetraphenylethane. On the other hand, during the oxidation the reaction mixture assumes a permanent pale yellow colour.Various reactions of diphenylmethyl compounds described in the literature as taking unexpected courses, may be readily explained by the occurrence of the diphenylmethyl ra

ISSN:0165-0513    

DOI:10.1002/recl.19390581204

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractA complete determination of the crystal structure of tetra phosphonitrile chloride P4N4Cl8has been made with the aid of Patterson‐ and Fourier analysis. The dimensions of the tetragonal elementary cell are:a= 10.82 ± 0.01 Å,c= 5.95 ± 0.01 Å. Number of molecules in the cellZ= 2,drö= 2.20. Space group C44h. All atoms are in four 8‐aequlivalent positions 8(g) with the parameter values:The molecule consists of an eight membered ring of alternating phosphorus and nitrogen atoms with each phosphorus atom carrying two chlorine atoms. The nature of the chemical bonds involved is discussed in relation to the distances observed. It is shown that resonance occurs between two possible arrangements of the double bonds in the ring, analogous to that in aromatic c

ISSN:0165-0513    

DOI:10.1002/recl.19390581205

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

Abstract2,6‐Dibromopyridine and dimethyl sulphate react to give 1‐methyl‐2,6‐dibromopyridinium methosulphate, which has only been obtained as an aqueous solution. 1‐Methyl‐2,6‐dibromopyridinium iodide has been obtained as a microcrystalline solid. These 1‐methylpyridinium compounds react with dilute alkali at room‐temperature to give 1‐methyl‐6‐bromo‐2‐pyridone.The constitution of this compound follows from its transformation into 2,6‐dibromopyridine by the

ISSN:0165-0513    

DOI:10.1002/recl.19390581206

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractLike 1:5‐dibromopentane, one mol of 1:4‐dibromobutane reacts with one mol of 1:2‐diaminoethane even when a large excess of the latter is present. The resulting product, 1‐(2′‐aminoethyl)‐pyrrolidine, has been investigated and it appears that most of its derivatives melt lower than the corresponding derivatives of 1‐(2′‐ami

ISSN:0165-0513    

DOI:10.1002/recl.19390581207

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractThe distribution of finely‐divided gold or silver iodide between water and an immiscible organic liquid depends upon the nature and concentration of the electrolytes present. A reasonable interpretation of the observed effects may be given in terms of the influence of the electrical double layer upon the adsorption of non‐electroly

ISSN:0165-0513    

DOI:10.1002/recl.19390581208

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractAdditional evidence for the structure of derride is given.The formation of 4‐hydroxycumarone‐5‐carboxylic acid by treatment of derride with alcoholic potash could be definitely proved.Derridenone was oxidised with hydrogen peroxide in alkaline medium and furan‐2,3‐dicarboxylic acid was isolated from the degradation products.Rissic acid and 2‐hydroxy‐4,5‐dimethoxybenzoic acid were found amongst the oxidation products obtained by oxidising dehydroderride with potassium permanga

ISSN:0165-0513    

DOI:10.1002/recl.19390581209

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractWhen 2,4,6‐tribromopyridine was heated with an excess of ammonia, a diaminobromopyridine of melting point 126° was obtained. This compound was submitted to catalytic reduction, when 2,6‐diaminopyridine was formed; therefore the diaminobromopyridine of m.p. 126° must be 2,6‐diamino‐4‐br

ISSN:0165-0513    

DOI:10.1002/recl.19390581210

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY

摘要:

AbstractIn Gegenwart von viel KMnO4gefälltes BaSO4enthält stets Permanganat und ist dadurch violett gefärbt. Das durch Adsorption oder Gittereinlagerung im Sulfat befindliche Permanganat ist gegenüber Reduktionsmittel weitgehend resistent. Dieser Effekt kann zum Nachweis von Barium und Sulfat in Form von Tropfenreaktionen verwendet wer

ISSN:0165-0513    

DOI:10.1002/recl.19390581211

出版商:WILEY‐VCH Verlag    

年代:1939

数据来源: WILEY