Using NMR Spectra to Analyze Molecular Structure The Proton Chemical Shift

USING NMR SPECTRA TO ANALYZE MOLECULAR STRUCTURE THE PROTON CHEMICAL SHIFT 

Why do the two different groups of hydrogens in chloro(methoxy)methane give rise to distinct NMR peaks How does the molecular structure affect the position of an NMR signal This section will answer these questions. 

The position of an NMR absorption, also called the chemical shift, depends on the electron density around the hydrogen. This density, in turn, is controlled by the structural environment of the observed nucleus. Therefore, the NMR chemical shifts of the hydrogens in a molecule are important clues for determining its molecular structure. At the same time, the structure of a molecule determines how it functions in an NMR experiment. 

The position of an NMR signal depends on the electronic environment of the nucleus 

NMR Different Types of Hydrogens Give Rise to Different Signals 

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