✍ Scribed by G. Klose; L. Trahms; A. Möps
No coin nor oath required. For personal study only.
The principal componenls or the 3'P chemical shirt baser in six phosphonic acid suers and ~\TJ phosphonic acids xverr determined. The chemical shirl anisorropies of the es~crs lie in rhr range herween 149 and 182 ppm and the asymmcq paramekrs between 0.1 and 0.5.
📜 SIMILAR VOLUMES
## Abstract The chemically nonequivalent ^31^P nuclei of the Diels‐Alder dimers of phospholium ions and phosphole oxides are coupled through three bonds by as much as 35–45 Hz. The chemical shift for a phosphorus atom in the 2‐phospholene moiety falls in the expected range; the shift for the constr
The t5N and 31P NMR spectra of the triply 15N labelled molecule P(N(CH3)2)3 oriented in a nematic phase, is reported. The NPN bond a&e is found equal to 97.6 i 0.3" and the 31P chemical shift tensor anisotropy Au equal to 80 \_' 15 ppm-
## Abstract One‐bond heteronuclear spin‐spin coupling constants ^1^__J__~PX~ (XH, O, S, Se, C and N) between the phosphorus atom and axial and equatorial substituents in dioxaphosphorinanes are computed using density functional theory (DFT). The experimental values of these coupling constants for
The first phosphines based on the benzo-7-phosphanorbornene system have been prepared and found to have extremely deshielded "P nuclei. The phosphie with a P-tert-butyl group gives the most downfield value (6 +152.5) ever recorded for a tertiary phosphiue. The lone-pair orientation in phosphines con