ISSN:
0749-1581
Schlagwort(e):
13C isotope shift
;
Dihedral angle dependence
;
Deuteriated compounds
;
Norbornane
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The complete set of deuterium-induced intrinsic 13C NMR isotope shifts, nΔ(13C), for norbornane have been determined from the isotopomeric monodeuteriated systems, and the results are discussed with respect to structure. No correlation is found between 1Δ values and the s character of the CD bond hybrid. For vicinal isotope effects, however, a quantitative correlation with the dihedral angles of the intervening 13C-—C—C—D bond fragment can be formulated: | 3Δ(13C) | (ppb) = 2.2 + [7.3 × 10-3(φ -117.8)2]Negative 3Δ values are found for bonding pathways in the five-membered ring partial structure with an anti arrangement of the CCCD bond fragment.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/mrc.1260260511