S'identifier

Chapter 16

Advanced Nuclear Magnetic Resonance Spectroscopy

RMN ¹H de molécules conformationnellement flexibles : résolution temporelle
RMN ¹H de molécules conformationnellement flexibles : résolution temporelle
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately ...
RMN ¹H de molécules conformationnellement flexibles : RMN à température variable
RMN ¹H de molécules conformationnellement flexibles : RMN à température variable
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one ...
RMN ¹H des protons labiles : résolution temporelle
RMN ¹H des protons labiles : résolution temporelle
Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding ...
RMN ¹H des protons labiles : substitution du deutérium (²H)
RMN ¹H des protons labiles : substitution du deutérium (²H)
This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is ...
Renforcement de l’Overhauser nucléaire (NOE)
Renforcement de l’Overhauser nucléaire (NOE)
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically ...
Noyaux insensibles améliorés par transfert de polarisation (INEPT)
Noyaux insensibles améliorés par transfert de polarisation (INEPT)
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and ...
Techniques de double résonance : aperçu
Techniques de double résonance : aperçu
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or ...
RMN bidimensionnelle (2D) : Vue d’ensemble
RMN bidimensionnelle (2D) : Vue d’ensemble
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily ...
RMN 2D : aperçu des techniques de corrélation homonucléaire
RMN 2D : aperçu des techniques de corrélation homonucléaire
Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations ...
RMN 2D : Spectroscopie de corrélation homonucléaire (COSY)
RMN 2D : Spectroscopie de corrélation homonucléaire (COSY)
Homonuclear correlation spectroscopy, or COSY, is a 2-dimensional NMR technique that provides information about coupled protons. Typically, the geminal ...
RMN 2D : aperçu des techniques de corrélation hétéronucléaire
RMN 2D : aperçu des techniques de corrélation hétéronucléaire
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an ...
RMN 2D : Spectroscopie de corrélation monoquantique hétéronucléaire (HSQC)
RMN 2D : Spectroscopie de corrélation monoquantique hétéronucléaire (HSQC)
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a ...
JoVE Logo

Confidentialité

Conditions d'utilisation

Politiques

Recherche

Enseignement

À PROPOS DE JoVE

Copyright © 2025 MyJoVE Corporation. Tous droits réservés.