NMR effects of acetylation and long-range coupling as a tool for structural elucidation of hydroxychromenes
β Scribed by A. Arnone; G. Cardillo; L. Merlini; R. Mondelli
- Book ID
- 104214221
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- French
- Weight
- 389 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
As a consequence of aggregate formation, no 'H NMR spectra of the amphiphilic antibiotic moenomycin A have been obtained previously. It was now found that the system moenomycin A-D20-C,D, after sonification yielded highly resolved 'H NMR spectra, probably due to the formation of a microemulsion. Sim
## Abstract Unresolvable long range spinβspin coupling which is not explicitly taken into account in total NMR bandshape analysis is demonstrated to be a potentially important source of systematic error, leading to Ξ__H__^β ^ and Ξ΄__S__^β ^ values incorrect by __c__. 1 kcal/mol and 2 to 4 cal/(mol K)