摘要:

1-, 2-, 3-, and 4-Acetylcarbazoles were converted to the corresponding carbazolylacetamides by the Willgerodt reaction. These were dehydrated with phosphorus oxychloride and the resulting 1-, 2-, 3-, and 4-cyanomethylcarbazoles reduced catalytically to the corresponding β-aminoethylcarbazoles. The syntheses of 1- and 4-acetylcarbazoles and 1-methoxy-4-β-aminoethyl-5, 6, 7, 8-tetra-hydrocarbazole are described.

ISSN:1923-4287    

DOI:10.1139/cjr50b-054

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

Cyclotetradecanol–on–2 was dehydrated in the gas phase to cyclotetradecen–one–3. The latter was reduced with lithium aluminum hydride to cyclotetradecen–ol–3, which was converted by dehydration to cyclotetradecadiene. This compound gave with maleic anhydride 3-6-decamethylene tetrahydrophthallic anhydride. The same series of reactions was performed in the cycloöctadecane series.

ISSN:1923-4287    

DOI:10.1139/cjr50b-055

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

Lycopodine gives rise to a hydrazone, is reduced to a secondary alcohol, and reacts with phenyl-lithium to form a tertiary carbinol; hence, the oxygen atom of the base is present in a keto group. The base reacts with cyanogen bromide to form two cyanobromolycopodines, α and β. α-Cyanobromolycopodine is converted by potassium acetate in alcohol to α-cyanoacetoxylycopodine, hydrolyzable to α-cyanohydroxylycopodine, which can be oxidized to an acid. The action of methanolic potassium hydroxide on α-cyanobromolycopodine gives rise to a nonoxidizable, nonreducible neutral compound, while a similar isomeric and equally inert substance is produced by the action of a boiling ethanolic solution of potassium acetate on β-cyanobromolycopodine. Both α- and β-cyanobromolycopodines are hydrogenated catalytically to two isomeric products C17H26ON2. α-Cyanobromolycopodine with trimethylamine forms of quaternary salt which, when subjected to the conditions of the Hofmann degradation, gives rise to a base differing from the quaternary salt by the elements of methyl bromide, and to the same neutral product obtainable from α-cyanobromolycopodine by the action of methanolic potassium hydroxide.

ISSN:1923-4287    

DOI:10.1139/cjr50b-056

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

It was assumed that any practical stabilizer for nitrocellulose would have to meet the following requirements: (a) absorb nitrogen dioxide at least as avidly as the accepted stabilizer,sym-diethyldiphenylurea (Centralite); (b) cause destruction of nitrocellulose in the Bergmann–Junk heat test no greater than that caused by the accepted stabilizer, diphenylamine; (c) be no less compatible than diphenylamine with nitrocellulose; and (d) melt no higher than 80 °C., have low volatility and low solubility in water. These requirements were met by N,N′-diethyl-N,N′-di-(3-methoxy-4-ethoxybenzyl) -urea, N,N′-diethyl-N,N′-di-(3,4-dimethoxybenzyl)-succinamide, di-(3,4-dimethoxystyryl)-ketone, and perhaps by veratric aldehyde. The criteria, however, were quite inadequate to assess in a positive way any practical value of the above substances as stabilizers. A study of substances structurally related to those already mentioned revealed no correlation between avidity for nitrogen dioxide and efficiency in improving the results of the Bergmann–junk test.Sym-N,N′-diethyl-N,N′-di-(3,4-dimethoxybenzyl)-succinamide and N-ethyl-N-propionyl-3,4-dimethoxybenzylamine were oils thought to be new, andsym-N,N′-diethyl-N,N′-dibenzylurea was obtained by an alternate procedure.

ISSN:1923-4287    

DOI:10.1139/cjr50b-057

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

Using structural data and vibrational frequencies measured recently, the thermodynamic functions of gaseous hydrogen peroxide were calculated by the statistical method over the range 298.16 to 1500°K. at 100° intervals. Some uncertainty results from the lack of accurate information on the potential barrier hindering free rotation of the OH groups in the molecule. The equilibrium constants of a few important reactions involving hydrogen peroxide were also calculated from existing data on the heat of decomposition and the heat of dilution.

ISSN:1923-4287    

DOI:10.1139/cjr50b-058

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

A simple apparatus has been developed for fractionating polycomponent gas samples at temperatures at which the take-off pressure is of the order of 0.5 mm. Fractions as small as 0.06 cc. of gas have been isolated and their vapor pressures determined.

ISSN:1923-4287    

DOI:10.1139/cjr50b-059

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

The method of mercury photosensitization has been used in an investigation of the reaction between atomic hydrogen and methyl chloride at 25 °C. The main products are methane, hydrogen chloride, and ethylene chloride. The last is assumed to rise through recombination of chloromethyl radicals formed by either of the reactions,

ISSN:1923-4287    

DOI:10.1139/cjr50b-060

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

The copolymerization of styrene and chloranil in the presence of benzoyl peroxide is described. The molecular weights of the copolymers were determined by osmotic pressure measurements and found to be between 9,000 and 30,000 for the different fractions; their chlorine content is between 37 and 38.2%. The copolymerization occurs with the carbonyl groups of the chloranil, transforming it into a derivative of tetrachlorohydroquinone. This reaction has been verified by degradation of the copolymers with hydrogen bromide.

ISSN:1923-4287    

DOI:10.1139/cjr50b-061

出版商:NRC Research Press    

年代:1950

数据来源: NRC

摘要:

A quantitative study of the extraction of tetravalent uranium into benzene by the action of the organic chelating agent thiophenoyl trifluoracetone is described. Data are presented to show that the uranous ion exists mainly in the quadruply charged form in solutions of perchloric acid. It is extracted into benzene as a neutral molecule containing four chelate groups per metal atom. At least two complex species, U(SO4)++and U(SO4)2are present in sulphuric acid solutions. Values of the association constants for the formation of these complex species are given.

ISSN:1923-4287    

DOI:10.1139/cjr50b-062

出版商:NRC Research Press    

年代:1950

数据来源: NRC