✦ LIBER ✦
Conformational properties of cyclic pentaalkoxy phosphoranes: Apical–equatorial attachment and nonchair conformation of the phosphorus-containing six-membered ring
✍ Scribed by Jaehoon Yu; Alan E. Sopchik; Atta M. Arif; Wesley G. Bentrude; G.-V. Roeschenthaler
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 649 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1042-7163
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✦ Synopsis
A series of' phosphoranes with pentacovalent phosphorus contained in a I ,3,2-dioxaphosphorinane ring have been studied by ' H Nh4R. One compound was investigated by low-temperature'3C N M R and another by X-ray crystallography. Although the ' H N M R parameters observed are time-averaged, the coupling constants can be accounted for if the phosphoranes have the six-membered ring attached apicalequatorial to phosphorus and occupy in solution rapidly isomerizing boat or slightly twisted boat conformations similar to that found in the X-ray study.