期刊
MAGNETIC RESONANCE IN CHEMISTRY
卷 44, 期 2, 页码 107-109出版社
WILEY
DOI: 10.1002/mrc.1766
关键词
NMR; HSQC; HMBC; covariance processing; long-range coupling
It was recently demonstrated that an IDR- (Inverted Direct Response) HSQC-TOCSY data set could be decomposed into a negatively phased direct response spectrum and a positively phased relayed response spectrum that could then be subjected to unsymmetrical indirect covariance processing for the removal of artifacts due to response overlap in the proton NMR spectrum of the molecule. Using experimentally discrete HSQC and HMBC data sets, it is shown that unsymmetrical indirect covariance processing of the pairof NMR spectra affords a presentation containing long-range carbon-carbon connectivity information. The method is demonstrated using strychnine as a model compound. The resulting data are largely free of artifacts although artifacts can arise due to proton response overlap, as previously reported. Copyright (c) 2005 John Wiley & Sons, Ltd.
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