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Unexpected axial preference of the Me2N substituent on the phosphorus atom of the P(III) 1,3,2-oxazaphosphorinane ring system

✍ 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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πŸ“œ SIMILAR VOLUMES


Unexpected axial preference of the Me2N
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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

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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

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## Abstract Proton, ^13^C and ^31^P n.m.r. spectra of the diastereoisomeric 2‐diphenylphosphino‐2‐oxo‐4‐methyl‐1,3,2‐dioxaphosphorinans 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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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.