One- and Two-Dimensional HMQC Experiment in Determination of Isotope Effects on Spin-Spin Coupling Constants (CROSBI ID 465015)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Novak, Predrag ; Meić, Zlatko ; Sterk, Heinz
engleski
One- and Two-Dimensional HMQC Experiment in Determination of Isotope Effects on Spin-Spin Coupling Constants
Intrinsic isotope effects have gained much interest when powerful high-resolution NMR spectrometers became available. Deuterium induces the largest changes in NMR spectral parameters and thus the majority of investigations are devoted to deuterium isotope effects. However, data on isotope effects on spin-spin coupling constants are rather scarce, mainly due to the relatively small changes in coupling constants upon isotopic substitution and complexity of the NMR spectra arising from higher-order effects.To circumvent this problem in deuteriated cis- and trans-stilbene, we applied one- and two-dimensional inverse (1H detected) heteronuclear multiple quantum correlation experiment, as well as the program for spectral calculation (PANIC). Deuterium-induced isotope effects on spin-spin coupling constants in cis- and trans-stilbene showed a conformational dependence. Changes in relative rotamer populations associated with different dihedral angles and bonds and vibrational averaging over these account for the measured isotope effects.
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Podaci o prilogu
1996.
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objavljeno
Podaci o matičnoj publikaciji
Book of Abstracts
Kraeutler, Bernhard
Innsbruck: University of Innsbruck
Podaci o skupu
2. Igler NMR Tage. Perspectives in NMR Spectroscopy
poster
08.02.1996-09.02.1996
Innsbruck, Austrija