J. Edsall
Apr 1, 1937
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Influential Citations
122
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Journal
Journal of Chemical Physics
Abstract
Raman spectra have been determined for methylated amines, and the corresponding ammonium chlorides in water; also for ethylamine and its hydrochloride, and the hydrochlorides of hydroxylamine, hydrazine and trimethylamine oxide. The spectra of the hydrochlorides arise only from the positively charged ammonium ion, since the chloride ion is not attached by any covalent bond, and, therefore, is not directly involved in any of the observed vibrations. Thus the spectrum of a methylated ammonium ion is found to be exactly similar in type to that of the analogous hydrocarbon in which a C atom is substituted for the positively charged N atom. If the —CH3 and —NH3 groups are treated schematically like single atoms of the same mass, all these compounds may be represented by simple models. The characteristic frequencies of such models may be correlated with lines in the observed spectra. Qualitative polarization measurements have been made on several of the substances studied and have proved of value in assigning o...