摘要:

AbstractThe partition of nitric acid between water and diethylether, methylisobutyl ketone, and dibutyl carbitol respectively has been measured at 25.0 ± 0.1° C in the range from 1 to 10 N. The experimental data are presented as mass and as concentration (mol/l) partition coefficients. The results seem to be accurate to within 1

ISSN:0165-0513    

DOI:10.1002/recl.19550740202

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe results of a preliminary investigation on the action of ethyl diazoacetate on 1‐butoxybutane, 1‐methoxyheptane, and a series of arylalkyl ethers are described.In every case but one, in addition to other processes, a remarkable reaction was observed, yielding the alkoxy or aryloxy derivatives of ethyl acetate.Ethyl phenoxyacetate was formed by the action of the reagent on methoxy‐, ethoxy‐, propoxy‐ as well as isopropoxybenzene; 1,2‐, 1,3‐, and 1,4‐dimethoxybenzene gave ethyl 2‐, 3‐, and 4‐methoxyphenoxyacetate respectively.1‐Methoxynaphthalene yielded ethyl 1‐naphthoxyacetate, but 2‐methoxynaphthalene was not converted into 2‐naphthoxyacetate, ethyl 1‐(2‐methoxynaphthyl) acetate being the chief reaction product.The mixture formed during the action of diazoacetic ester on 1‐methoxyheptane contained the ethyl esters of both heptoxy‐ and methoxyacetic acid.We have started a more extensive investigation on the reaction of ethyl diazoacetate and 1‐butoxybutane. In this case the fate of the alkyl radical expelled during the formation of the alkoxyacetic ester was revealed, since we iso

ISSN:0165-0513    

DOI:10.1002/recl.19550740203

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractA new synthesis of 2,4,5‐trichlorophenoxyacetic add (2,4,5‐T) is described.A mixture of the insecticidally inactive α‐ and β‐isomers of hexachlorocyclohexane, obtained as a by‐product in the manufacture of the γ‐isomer is converted into 1,2,4‐trichlorobenzene. After converting the 1,2,4‐trichlorobenzene into 2,5‐dichlorophenol, the latter is reacted with monochloroacetic add to 2,5‐dichlorophenoxyacetic add and chlorinated into 2,4,5‐T. The overall yield of 2,4,5‐T calculat

ISSN:0165-0513    

DOI:10.1002/recl.19550740204

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe basic strength of dibenzoquinuclidine (III) is found to be about 3 pKaunits lower than that of benzoquinuclidine (II). This corroborates an earlier conclusion that the inductive effect of a phenyl group introduced on the nitrogen atom of an amine, brings about a decrease of the basic strength of this magnitude.Ultra‐violet spectra and the coupling (in) ability are discusse

ISSN:0165-0513    

DOI:10.1002/recl.19550740205

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe reaction velocities of a number of aminonaphthalenes, ‐anthracenes, and ‐phenanthrenes with 2,4‐dinitrochlorobenzene in ethanol were measured. It is shown that the logarithm of the reaction constants is inversely proportional to the localization energy or to the charge density at the extra‐cyclic atom as calculated for the hydrocarbon analogues of the

ISSN:0165-0513    

DOI:10.1002/recl.19550740206

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractEthyl 2‐pyridoxyacetate is obtained as chief product, together with a small amount of N‐(2‐pyridonyl) acetic ester, by reacting pyridone‐2 with ethyl diazo

ISSN:0165-0513    

DOI:10.1002/recl.19550740207

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe thermodynamic quantities of the terms of homologous series in general vary linearly with the number of carbon atoms. Making use of the linear trend of the free enthalpy and, where possible, allowing for a deviation in the case of the lowest terms (initial term effect), we have calculated the composition of a number of equilibrium mixtures in homologous series at temperatures of 300°K−1000°K, and reproduced these compositions in graphs. Deviations from the ideal gas laws and the possible occurrence of liquid have been left out of consideration. As the summation over a limited number of terms leads to relatively simple equations, more complicated equilibria can also be dealt with. Here the following equilibrium mixtures have been calculated:a) n‐l‐alkenesb) n‐l‐alkenes and n‐alkylcyclohexanes, andc) n‐l‐alkenes, n‐alkane‐thiols,

ISSN:0165-0513    

DOI:10.1002/recl.19550740208

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractIn order to determine the concentration of zinc in blood with greater precision than before, a method has been worked out of which the main points are:(a) complete evaporation of the metal out of a weighed amount (of 10 mg) of bloodash;(b) a constant arc temperature independent of a varying sodium content of the bloodash;(c) a rotating anode of a definite shape.By using this method concentration values have been determined with a St. dev. of 5%. As for the absolute concentration of zinc in various blood samples, values found in applying the method of successive additions, agreed satisfactorily with those determined chemically.

ISSN:0165-0513    

DOI:10.1002/recl.19550740209

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractOn décrit la préparation, à partir de l'acénaphtènequinone et de l'oxyde de deutérium, du 1,1,2,2‐tétradeutérioacénaphtène par la méthode deClemmensen; Iorsque la réduction est incomplète, on aboutit au 1‐oxo‐2,2‐dideutérioacénaphtène. Une réduction analogue de la fluorénone conduit

ISSN:0165-0513    

DOI:10.1002/recl.19550740210

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY

摘要:

AbstractThe reaction of trans‐cinnamic acid (I) with formaldehyde in acetic‐sulphuric acid solution yielded 4‐phenyl‐5‐carboxy‐1,3‐dioxane (II). Degradation of the carboxyl group according to the methods ofHofmannorCurtiusyielded 4‐phenyl‐5‐amino‐1,3‐dioxane (III). The 1,3‐dioxane ring could be opened by means of phloroglucinol and hydrochloric acid. Acetylation of the product of the latter reaction yielded the triacetate of dl‐erythro‐1‐phenyl‐

ISSN:0165-0513    

DOI:10.1002/recl.19550740211

出版商:WILEY‐VCH Verlag    

年代:1955

数据来源: WILEY