✦ LIBER ✦
Does the ipso-carbon chemical shift tell us anything about the structure of phenylated phosphorus compounds?
✍ Scribed by Zi-Ping Liu; Manfred Schlosser
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 406 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1042-7163
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The nuclear magnetic resonance signals exhibited by the ipso‐carbon atoms of a variety of phenylated phosphorus compounds were found to span over the remarkably wide range of + 162 to + 117 ppm. Nevertheless, these changes in chemical shifts have little diagnostic value. They are tentatively attributed to a charge‐mediated contraction and expansion of the C,P σ‐bond orbital on one hand and to a σ‐bond induced deformation of the aromatic π‐electron cloud on the other.