Long-range carbon-proton spin-spin coupling in carboxyl-labeled crotonic and isocrotonic acids

Autor:	James L. Marshall, Ruth Seiwell
Rok vydání:	1974
Předmět:	Coupling Crystallography Range (particle radiation) Geminal chemistry Stereochemistry Proton spin crisis General Engineering Proton NMR chemistry.chemical_element Spin (physics) Carbon
Zdroj:	Journal of Magnetic Resonance (1969). 15:150-156
ISSN:	0022-2364
DOI:	10.1016/0022-2364(74)90184-x
Popis:	All J CH values, including signs, involving the carboxyl carbon of crotonic and isocrotonic acids have been derived from a proton NMR study involving spintickling of the >90%- 13 C-carboxyl-labeled derivatives. These long-range J CH values, along with J CH values previously obtained from the benzoate and acrylic systems, correlate well with the J HH values of geometrically equivalent proton-proton systems (except for the geminal couplings), attesting to similar coupling mechanisms in carbon-proton and proton-proton systems for 3-, 4-, and 5-bonded couplings.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::03af51b9bdda9b8aa677104a6f4bb8b1 https://doi.org/10.1016/0022-2364(74)90184-x Zobrazit plný text záznamu