pubmed-article:9472797 | pubmed:abstractText | Spin-7/2 central line intensities are calculated for any ratio of the quadrupolar coupling constant to the radiofrequency field for both one-pulse and two-pulse Hahn-echo experiments and tested by 59Co NMR on the model compounds, Na3[Co(NO2)6] and trans-[Co(en)2(NO2)2]NO3. The Hahn-echo sequence is then used to obtain the quadrupole coupling constant and asymmetry parameter on a powder sample of Co4(CO)12. This technique is found to be particularly useful when the NMR spectrum is broad and featureless. | lld:pubmed |