摘要:

One of the constituents of the root ofCicuta maculataL. has been isolated in crystalline form. It has been found to contain three methoxyl groups and to possess a lactone structure.

ISSN:1923-4287    

DOI:10.1139/cjr42b-022

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

Previous experimental studies of dicyanotriazole have resulted in statements that the compound is an acid comparable in strength with the strong mineral acids.In the present work, measurements of the equivalent conductance of dicyanotriazole in dilute aqueous solution give the dissociation constant of the acid as 3.378 × 10−2at 25 °C., thus showing it to be an acid possessing about the same strength as dichloracetic acid.The limiting equivalent conductance of dicyanotriazole at 25 °C. is 384.9. The earlier work gave a value of 397.44.

ISSN:1923-4287    

DOI:10.1139/cjr42b-023

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The study of the hydrolysis of propionitrile in concentrated acid solutions has been extended to hydrobromic, nitric, and sulphuric acids for a range of acid concentrations. For the system of irreversible, unimolecular consecutive reactions, nitrileamideacid,for all acid concentrations below 4 N. At higher concentrations,k1andk2are of the same order, and, in the case of sulphuric acid,k1becomesk2at concentrations above 20 N. The observed activation energy decreases with increasing acid concentration for all acids. The specific differences in rate increase with acid concentration may be accounted for by the specific variations ofAandEfor each acid.

ISSN:1923-4287    

DOI:10.1139/cjr42b-024

出版商:NRC Research Press    

年代:1942

数据来源: NRC