13C, 31P and 1H NMR studies of chiral bis[(4R,6R)-4,6-dimethyl-1, 3, 2-dioxaphosphorinan-2-yloxy]alkane derivatives. Coupling between phosphorus atoms six bonds apart

13C, 31P and 1H NMR studies of chiral bis[(4R,6R)-4,6-dimethyl-1, 3, 2-dioxaphosphorinan-2-yloxy]alkane derivatives. Coupling between phosphorus atoms six bonds apart

13C, 1H and 31P NMR investigations were carried out to confirm the stereochemistry of novel bis[(4R,6R)‐4,6‐dimethyl‐1,3,2‐dioxaphosphorinan‐2‐yloxy]alkanes. The 13C NMR spectra exhibited second‐order features at room temperature. Substantial coupling was found between P atoms six bonds apart. The p...

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Veröffentlicht in:Magnetic resonance in chemistry 1987-09, Vol.25 (9), p.761-765
Hauptverfasser: Szalontai, G., Bakos, J., Tóth, I., Heil, B.
Format: Artikel
Sprache:eng
Schlagworte:
13C
13C, 1H, 31P NMP spectra
2-dioxaphosphorinanes
31P NMP spectra
Atomic and molecular physics
Chiral P-substituted 1
Chiral P‐substituted 1,3,2‐dioxaphosphorinanes
Exact sciences and technology
General molecular conformation and symmetry
stereochemistry
Molecular properties and interactions with photons
Physics
Properties of molecules and molecular ions
six-bond 6J (PP) coupling
Spin simulation of AXX systems
Substantial temperature-dependent
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Zusammenfassung:13C, 1H and 31P NMR investigations were carried out to confirm the stereochemistry of novel bis[(4R,6R)‐4,6‐dimethyl‐1,3,2‐dioxaphosphorinan‐2‐yloxy]alkanes. The 13C NMR spectra exhibited second‐order features at room temperature. Substantial coupling was found between P atoms six bonds apart. The possibility of a through‐space contribution was tested. Spatially close P atoms and the strongly electronegative P substituents (oxygen atoms) are thought to be responsible for the enhanced P… P coupling.
ISSN:0749-1581
1097-458X
DOI:10.1002/mrc.1260250905