Amine-ammonium salt systems in the interpretation of PMR spectra

Autor:	L. P. Krasnomolova, K. I. Khludneva, G. S. Litvinenko
Rok vydání:	1983
Předmět:	chemistry.chemical_classification Proton Chemical shift Organic Chemistry Salt (chemistry) chemistry.chemical_element Protonation Conjugated system Nitrogen chemistry.chemical_compound chemistry Organic chemistry Physical chemistry Amine gas treating Ammonium
Zdroj:	Chemistry of Heterocyclic Compounds. 19:1210-1212
ISSN:	1573-8353 0009-3122
DOI:	10.1007/bf00515359
Popis:	The stepwise protonation of amines can be utilized for the interpretation of the PMR spectra of conjugated pairs consisting of an amine and its salt. A linear dependence of the proton chemical shifts on the composition of the amine-salt system has been demonstrated in the example of 2a-methyl-4-keto-trans-decahydroquinoline, making it possible to determine the proton chemical shifts, which are hidden in one of the partners by other signals, by means of extrapolation. The chemical shifts of the protons nearest the nitrogen atom vary in the following order upon protonation: α-H α tert > α-He e tert ≈ β-H α tert > β-H α sec ≈ β-H e sec ≈ β-Hpr.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8404a4e28e9d5d0732664609f90c462d https://doi.org/10.1007/bf00515359 Zobrazit plný text záznamu Full text from SpringerLink