Splitting patterns, of common multiplets

First-order splitting patterns for some common molecular structures. (Numbers in circles represent relative total areas of the multiplets)... 

Multiplet analysis is one of the most useful analytical tools in ID WIN-NMR it simplifies the measurement of coupling constants, it is the first step in disentangling overlapping multiplets of complex multi-spin systems and it provides the input parameters for the WIN-DAISY computer analysis program. It is based on the AX approximation and uses distance measurement to build up coupling patterns by recognizing lines split by a common coupling constant. 

Finally, note that the spin-spin splitting gives a new type of structural information. It reveals how many hydrogens are adjacent to each type of hydrogen that is giving an absorption peak or, as in these cases, an absorption multiplet. For reference, some commonly encountered spin-spin splitting patterns are collected in Table 3.8. 

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