Multidimensional critical parameters

There is a bewildering variety of multidimensional NMR techniques available to the modem NMR spectroscopist interested in stmcture elucidation, and used in a concerted fashion these provide efficient and economical tools for determining chemical structures. There is a trade-off implicit in the use of multidimensional experiments, between the volume of information that they provide and the minimum time taken to perform them in most cases the extended experimental duration is more than compensated for by the wealth of structural information revealed. For a small proportion of stmctural problems, however, such experiments may provide far more information than is actually required, and where only a few critical parameters need to be measured they may represent a far from efficient use of spectrometer time. 

It cannot be denied that several critical parameters have to be considered in order to benefit from multidimensional separations. 

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