Monday, April 28, 2008
Many NMR users are very familiar with the 1H COSY experiment. It is used extensively by organic chemists. Many people do not realize that the COSY method can be used for many other abundant isotopes as well. The figure below shows the 11B COSY spectrum of ortho-carborane. The data were collected with 1H decoupling and allow the complete assignment of the 11B NMR spectrum. Note that in this case, the 11B - 11B J couplings are unresolved in the 1D spectrum. Thank you to Dominique Duguay for providing the sample for the figure.