Steric and electronic effects on 31P and 51V shielding in carbonylphosphinevanadium complexes
✍ Scribed by Dieter Rehder
- Publisher
- Elsevier Science
- Year
- 1980
- Weight
- 807 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0022-2364
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## Abstract An examination of published ^31^P NMR spectral data for aliphatic phosphorus compounds has revealed that chain lengthening and branching effects on the chemical shift can be interpreted in terms similar to those used for ^13^C and ^15^N shifts. For six families of phosphorus compounds,
## Abstract The ^34^S isotope effect on the chemical shift of P^III^ nuclei in P(SR)~3~ esters [R = Et, (C~12~H~25~)~n~, Ph] is close to 20.6 ppb per P^III^^34^S bond, i.e. 3–4 times larger than for thiolo sulphur atoms in S = P(SR)~3~ or O = P(SR)~3~. A similar behaviour is noted for the P(S)~3
## Abstract Platinum‐195 chemical shift measurements for __cis__‐PtCl~2~(PCy~3~)~2~ and __trans__‐PtXCl(PCy~3~)~2~ (X = H, Cl, SnCl~2~Ph and SnCl~3~) in methylene chloride solution are reported. A comparison of these shifts with those from analogous complexes containing less bulky phosphine ligands
## Abstract Rate constants for the hydrolysis (__k__~h~) of six different amines in __trans‐__[Co((BA)~2~en)(amine)~2~]ClO~4~ complexes (amine = aniline 1a, para‐toluidine 1b, benzylamine 1c (primary amines), pyrrolidine 2a, piperidine 2b, morpholine 2c (secondary amines), and (BA)~2~en = Bisbenzoy