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Long-range CH correlation 2D NMR spectroscopy 2—effect of TANGO and BIRD pulses

✍ Scribed by V. V. Krishnamurthy; John E. Casida

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
384 KB
Volume
26
Category
Article
ISSN
0749-1581

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✦ Synopsis

The basic CH correlation sequence, with the delays lengthened to facilitate long-range correlations, was modified by using TANGO and BIRD pulses (both basic and composite) to facilitate both the suppression of one-bond cross-peaks and the decoupling of long-range cross-peak intensity modulations due to one-bond coupling. The relative effectiveness of these modifications is illustrated with nkotinamide as a model compound. The use of a combination of the basic TANGO pulse and the basic BIRD pulse achieves both of these aims. The composite TANGO pulse can replace the basic TANGO pulse when more effective suppression of one-bod crars-peaks is needed. The use of the composite BIRD pulse during refocusing increases F, noise and artifacts and is therefore not recommended.

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