The relative signs of the NMR coupling constants in trimethylstannylphenylphosphines
โ Scribed by P.G. Harrison; S.E. Ulrich; J.J. Zuckerman
- Publisher
- Elsevier Science
- Year
- 1971
- Weight
- 136 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0020-1650
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๐ SIMILAR VOLUMES
## Abstract Analysis of the noise decoupled ^13^C spectra of doubly ^13^C labelled compounds where the two labelled carbons are identical, makes the determination of reltive signs of ^13^C๏ฃฟ^13^C coupling constants possible in a very simple way. The involved carbon form AA'X or AA'B spin systems.
High-resolution proton spectra of acridine and the five monomethyl derivatives have been analyzed using multiple resonance and computer techniques. It was possible to determine the magnitudes and relative signs of the inter-ring coupling constants between H-C( 9) and all the protons of the adjacent