✦ LIBER ✦
On the lack of evidence for contact contributions to lanthanide-induced N.M.R. shifts (L.I.S.'s) in aromatic aldehydes: a rigorous error analysis and the isolation of diamagnetic (complexation) shifts.
✍ Scribed by Raymond J Abraham; Derek J Chadwick
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- French
- Weight
- 256 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
The adoption of a rigorous error analysis of L.I .S. 's allows the non-pseudo-contact components of the Yb(fod)a induced shifts in benzaldehyde and thiophen-Z-aldehyde to be isolated.
They are largest at the carbonyl carbon and at the ortho and pam carbons and appear to be entirely due to complexation (diamagnetic) shifts. Estimation of these with La (fod)a allows a precise analy-