## Abstract A series of intramolecularly hydrogenโbonded enamines, enols and enethiols with ester carbonylic, ketonic carbonylic, thioester carbonylic, nitro and sulphoxide acceptors were investigated to obtain ^13^C chemical shifts and deuterium isotope effects. Results from 33 new compounds and s
Deuterium isotope effects on 13C chemical shifts of intramolecularly hydrogen-bonded Schiff bases
โ Scribed by Rozwadowski, Zbigniew; Majewski, Eugeniusz; Dziembowska, Teresa; Erik Hansen, Poul
- Book ID
- 111907532
- Publisher
- Royal Society of Chemistry
- Year
- 1999
- Tongue
- English
- Weight
- 205 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1472-779X
- DOI
- 10.1039/a903200b
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17O chemical shifts were measured in 40 enamines activated in the b-position by CxO, COO, NO 2 , SO and groups. Data for the oxygen-containing series of o-hydroxyacyl aromatics are also included for com-SO 2 parison. Intramolecular hydrogen bonding in the enamines is discussed in terms of the accept
## Abstract Longโrange deuterium isotope effects on ^13^C chemical shifts, ^__n__^ฮC(OD), were studied in the intramolecularly hydrogenโbonded purpurogallins (benzotropolones). A very large longโrange isotope effect from the hydrogenbonded 4โOH(D) is observed over six bonds at Cโ7. Further, longโra
The deuterium isotope effects on 13 C chemical shift of Schiff bases lithium salts, derivatives of amino acids (glycine, L-alanine, L-phenylalanine, L-valine, L-leucine, L-isoleucine and L-methionine) and 2-hydroxynaphthaldehyde in D 2 O as well as UV-vis spectra in different solvents have been meas