The conformations of a series of 5,5-dimethyl-Z-Z-1,3f2-oxazaphosphorinanes (Z = MeO, (CF,),CHO, Ph, MeaN, and I-Pr N) have been investigated by H NMR spectroscopy and by X-ray crystallography. Surprising y, T Me,N displays a strong preference for axial attachment to the ring; and 1-Pr,N also is axi
Unexpected axial preference of the Me2N substituent on the phosphorus atom of the P(III) 1,3,2-oxazaphosphorinane ring system
β Scribed by Y. Huang; N. Mullah; A.E. Sopchik; A.M. Arif; W.G. Bentrude
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- French
- Weight
- 51 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
It was shown by NMR spectmscopy that the 1,3,2-dioxaphosphorinane cycle has a chair conformation [1.2.31. In tricoordinate phosphorus derivatives, the preferred orientation for the substituent on phosphorus (-OR or halogen1 remains a subject of discussion. In fact, proofs of the preferred axiality h
## Abstract Proton, ^13^C and ^31^P n.m.r. spectra of the diastereoisomeric 2βdiphenylphosphinoβ2βoxoβ4βmethylβ1,3,2βdioxaphosphorinans indicate that the diphenylphosphino group is essentially axial for the __trans__ isomer, whereas it is predominantly equatorial in the case of the __cis__ isomer.
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