structure elucidation 4 | Interactive session | Spectral interpretation

HOW TO CALCULATE COUPLING CONSTANTS IN NMR

The signals of protons, which have other magnetically inequivalent protons at geminal or vicinal positions are split because of spin-spin coupling between these neighboring protons. The splitting of the signal can be measured by calculating the coupling constant of the concerned signal. Coupling constant is a constant value, independent of the magnetic field strength and it mostly depends upon the extent of interaction between two proton systems. Denoted by “J”, the values of coupling constants are calculated in Hz.

HOW TO DRAW A COUPLING TREE IN NMR

Coupling tree is a pattern developed as a result of the splitting of signals in 1H-NMR due to spin-spin coupling. The tree tells us about the splitting pattern of the signal and also helps in calculation of the coupling constant.

The Magic of NMR: Magic Angle Spinning NMR

The application of NMR in studying different types of samples is a proven fact, but still it finds some limitations in analyzing some samples. NMR scientists have always been looking for the discoveries of new techniques for better results. Magic Angle Spinning (MAS) NMR is one such magical technique.

10 MOST INTERESTING ACRONYMS IN NMR

Nuclear Magnetic Resonance (NMR) spectroscopy is one of the most powerful analytical tools used for various purposes in scientific research. Chemists are the largest group of users of NMR, employed mainly for structure elucidation of unknown compounds. Several different types of techniques (each differing from the other by the pulse sequence involved) are used in NMR, affording different information about the structure of a compound. NMR has some of the most comprehensive terminologies used for its techniques. The acronyms used are even more interesting.

Following is a list of the acronyms of 10 different techniques used in NMR. Rest assured you will enjoy the ride.