NMR Spectra of indolizines and their ? complexes

Autor:	V. N. Torocheshnikov, Eugene V. Babaev, S. I. Bobrovskii
Rok vydání:	1995
Předmět:	NMR spectra database Computational chemistry Chemistry Chemical shift Organic Chemistry Spectral properties Cationic polymerization Analytical chemistry MNDO Atomic charge Protonation Spectroscopy
Zdroj:	Chemistry of Heterocyclic Compounds. 31:1079-1087
ISSN:	1573-8353 0009-3122
DOI:	10.1007/bf01165054
Popis:	New and previous data on the1H and13C NMR spectra of indolizines with electron-withdrawing groups at C(1), C(3), C(6), and C(8) obtained in our laboratory are reviewed. The chemical shifts in the13C NMR spectra were compared with the total atomic charge values calculated by the MNDO method. Feasibility was demonstrated for the use of PMR spectroscopy to identify isomers for pairs of 1(3)- and 6(8) -substituted indolizines and to establish the protonation site of such compounds. Evidence was obtained for the unexpected ipso protonation in 3-substituted indolizines. The spectral properties of cationic and anionic sigma complexes involving indolizines were discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6e53f9cbe301063d5021bbf1fbed77db https://doi.org/10.1007/bf01165054 Zobrazit plný text záznamu Full text from SpringerLink