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Determination of long-range 1H13C coupling constants of cis-verbenol by modified 2D J spectroscopy

✍ Scribed by Teodor Parella; Francisco Sánchez-Ferrando; Albert Virgili

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
373 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Known selective 2D J‐resolved methods for the determination of long‐range proton–carbon coupling constants, ^n^J(C, H), have been modified and improved by introducing an INEPT or refocused INEPT sequence as a preparation period in the Bax–Freeman selective spin–flip method, or using exclusively selective pulses from the decoupler channel in the selective INEPT‐2D experiment. The greater sensitivity achieved allowed the determination of these couplings, even for quaternary carbons, in a short acquisition time and with excellent reproducibility for cis‐verbenol.

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