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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

Novak, Predrag ; Meić, Zlatko ; Sterk, Heinz One- and Two-Dimensional HMQC Experiment in Determination of Isotope Effects on Spin-Spin Coupling Constants // Book of Abstracts / Kraeutler, Bernhard (ur.). Innsbruck: University of Innsbruck, 1996

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

Povezanost rada

Kemija