Two-dimensional NMR spectroscopy of connected transitions by linear combination of flip angle dependent cosy: An alternative scheme for E.COSY
✍ Scribed by K. Chandrasekhar; Anil Kumar
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 353 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
An alternative pulse scheme which simplifies and improves the recently proposed P.E.COSY experiment is suggested for the retention of connected or unconnected transitions in a coupled spin system. An important feature of the proposed pulse scheme is the improved phase characteristics of the diagonal peaks. A comparison of various experiments designed for this purpose, namely COSY-45, E.COSY, P.E.COSY and the present scheme (A.E.COSY), is also presented. The suppression of unconnected transitions and the measurement of scalar coupling constants and their relative signs are illustrated from A.E.COSY spectra of 2,34ibromopropionic acid and 2(2-thieny1)pyridine.