J-coupling - Wikipedia
In NMR spectroscopy, J-coupling contains information about relative bond distances and angles. Most importantly, J-coupling provides information on the connectivity of chemical bonds. It is responsible for the often complex splitting of resonance …
J-Coupling (Scalar) - Chemistry LibreTexts
2023年1月30日 · Introduction. A J-coupling is an interaction between nuclei containing spin. J-couplings are also known as scalar couplings. This interaction is mediated through bonds, in contrast to dipole interactions, which are mediated through space.
14.12: Coupling Constants Identify Coupled Protons
Chemists quantify the spin-spin coupling effect using something called the coupling constant, which is abbreviated with the capital letter J. The coupling constant is simply the difference, expressed in Hz, between two adjacent sub-peaks in a split signal.
Angular momentum coupling - Wikipedia
In quantum mechanics, angular momentum coupling is the procedure of constructing eigenstates of total angular momentum out of eigenstates of separate angular momenta. For instance, the orbit and spin of a single particle can interact through spin–orbit interaction, in which case the complete physical picture must include spin–orbit coupling.
J Coupling - SpringerLink
J or scalar coupling between magnetic nuclei (otherwise termed nuclear spins) is coupling via the intervening network of chemical bonds and depends on interaction between the nuclear spins and bonding electron spins.
8.8: Coupling of Angular Momentum and Spectroscopic Term …
2022年4月21日 · There are two descriptions for the coupling of angular momentum. One is called j-j coupling, and the other is called L-S coupling. The j-j coupling scheme is used for heavy elements (Z > 40), and the L-S coupling scheme is used for the lighter elements. L-S coupling also is called R-S or Russell-Saunders coupling.
NMR J-couplings - University of Cambridge
NMR J-coupling or nuclear spin-spin coupling is an indirect interaction of the nuclear magnetic moments mediated by the bonding electrons. It is manifested as the fine structure in NMR spectra, providing a direct measure of bond strength and a …
Methods to measure J-couplings from the superposition of in-phase and anti-phase (IPAP) are quite straightforward to implement and yield good success in cases of large- and uniform couplings (Sörensen et al., 1997).
The suppression of J-coupling during a FSE sequence is considered a nuisance. However, the effect can also have advantages. Spin locking: the application of a long, strong continuous Rf pulse along a specified axis, e.g. x, in the rotating frame.
J-coupling, also known as scalar coupling, arises from nuclear magnetic moments in the same molecule affecting each other through the electron cloud, which is shared among atoms due to the molecular bonds in the molecule.