Constant time inverse-detection gradient accordion rescaled heteronuclear multiple bond correlation spectroscopy: CIGAR-HMBC
✍ Scribed by Chad E. Hadden; Gary E. Martin; V. V. Krishnamurthy
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 83 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
A further refinement of the recently reported IMPEACH-MBC long-range heteronuclear shift correlation experiment is described. The new experiment, CIGAR-HMBC (constant time inverse-detected gradient accordion rescaled long-range heteronuclear multiple bond correlation), modifies the constant time variable delay of the IMPEACH-MBC experiment to allow user-determined scaling of F 1 modulation. The refinement offered in the CIGAR-HMBC experiment allows the investigator to reintroduce whatever degree of F 1 modulation is desired to authenticate weak long-range responses. Results obtained with the CIGAR-HMBC experiment using a range of values for J scale are compared with results obtained with identically optimized ACCORD-HMBC and IMPEACH-MBC experiments.