摘要:

The hydrolysis of propionitrile has been studied in aqueous hydrochloric acid solutions from 0.5 to 10 Nand over a range of temperatures at six acid concentrations. The rate of hydrolysis as measured by ammonia formation is dependent upon the decomposition of the intermediate amide at acid concentrations above 4 N. The system represented by nitrileamideacid affords a good example of consecutive, irreversible unimolecular reactions over the complete range(below 4 N) to(above 11 N). A marked increase in rate with increasing acid concentration is accounted for in large measure by a decrease in observed activation energy of 6.7 Cal. over the range 1 to 10 N.

ISSN:1923-4287    

DOI:10.1139/cjr42b-019

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

All 7 monomethyl- and all 21 dimethyl-quinolines were synthesized by unambiguous methods and those solid above room temperature were purified to their maximum melting points. The picrates, styphnates, and trinitro-m-cresolates of each quinoline were prepared and their properties recorded. The picrates in particular were purified to their ultimate melting points. Incidentally, 7-ethyl-quinoline and a number of trimethyl-quinolines were also prepared. It is concluded that the melting points previously given in the literature for most of the picrates are of little use for identification purposes.

ISSN:1923-4287    

DOI:10.1139/cjr42b-020

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The dehydrogenation of lycopodine with selenium has yielded a mixture of five bases, two of which have been identified as 7-methyl-quinoline and 5:7-dimethyl-quinoline respectively. Heating the alkaloid with palladium on barium sulphate or with phthalic anhydride also yields 7-methyl-quinoline. It is concluded that the quinoline nucleus, completely hydrogenated, is present as such in lycopodine. The oxygen may be present as a cyclic ether.

ISSN:1923-4287    

DOI:10.1139/cjr42b-021

出版商:NRC Research Press    

年代:1942

数据来源: NRC