ISSN:
0749-1581
Schlagwort(e):
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The 100.6 MHz 13C off-resonance-decoupled and polarization-transfer NMR spectra of 7,12-dimethylbenz[a]anthracene and its 5-deuteriated analogue in deuteriated chloroform solution enabled assignments of the shifts of C-3 and C-5 to be revised, and other spectral ambiguities to be reduced. Negative, i.e. upfield, deuterium-induced secondary isotope shifts, Δδ = δ(C…D) - δ(C…H), were evident over one, two, three and four bonds and, also, small apparently significant positive shifts to the methyl carbons at the 7- and 12-positions, i.e. over five and six bonds, respectively. 13C—1H coupling constants were unaffected by the deuteriation.
Zusätzliches Material:
2 Tab.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/mrc.1260230922
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