The diphenyliodonium-2-carboxylates: An NMR structure investigation

Autor:	Dario Del Mazza, Manfred G. Reinecke, William B. Smith
Rok vydání:	1980
Předmět:	Proton Stereochemistry Relaxation (NMR) General Chemistry Ring (chemistry) Medicinal chemistry chemistry.chemical_compound Trigonal bipyramidal molecular geometry chemistry Group (periodic table) Reagent Phenyl group General Materials Science Carboxylate
Zdroj:	Organic Magnetic Resonance. 14:540-542
ISSN:	1097-458X 0030-4921
Popis:	Diphenyliodonium-2-carboxylate, phenyl 4-methylphenyliodonium-2-carboxylate and phenyl 5-methyl-phenyliodonium-2-carboxylate have been examined by 1H and 13C NMR spectroscopy. Each compound showed one proton considerably upfield from the others. From the two substituted compounds this was deduced to be H-6 on the ring containing the carboxylate group. Shift reagents and relaxation measurements were used to make the 13C chemical shift assignments. These data are most consistent with a cyclic, neutral structure for these iodonium carboxylates. The iodine is in the center of a trigonal bipyramid with the unsubstituted phenyl and carboxylate group apical, which places the C-6 proton in the shielding region of the adjacent phenyl group.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b34e59a5f35a40181da6ff2654ce9cca https://doi.org/10.1002/mrc.1270140624 Zobrazit plný text záznamu Plný text