An assignment of relative configurations has been achieved for the diastereomeric racernates(lR2R,lS2S) and (1R2S, 1S2R) of 3,3-dimethyl-l,2-diphenylbuta~-l-ol through the comparative analysis of the respective chemical shifts induced by Eu(fod), in the 'H and '"C NMR spectra, and the corresponding
Mass spectrometry of the paramagnetic nmr shift reagents Eu(fod)3 and Yb(fod)3 and their adducts with propylamine
β Scribed by J.A. Peters; P.J.W. Schuyl; A.H. Knol-Kalkman
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- French
- Weight
- 192 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
By means of electron impact mass spectrometry, the occurrence of dimeric (or higher) associates of the lanthanide shift reagents Eu(fod)j and Yb(fod)3 has been demonstrated. Also, the occurrence of 1:l and I:2 adducts of Ln(fod)s with propylamine was shown.
π SIMILAR VOLUMES
## Abstract The isomeric tricyclo[4.4.1.1^2,5^]dodecanβ11βols have been synthesized from the (6+4) cycloaddition product of tropone with cyclopentadiene. The configuration and conformation of each isomer was determined from the proton shift gradients induced in the olefinic proton signals in the ^1