Direct observation of free and complexed substrate in a lanthanide shift reagent system
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 6,p. 312-313
- https://doi.org/10.1039/c39720000312
Abstract
The 1H n.m.r. spectra of mixtures of tris-(1,1,1,2,2,3,3-heptafluoro-7,7-[2H6]dimethyl[2H3]octane-4,6-dionato)europium and excess of dimethyl sulphoxide in CD2Cl2 have been determined over a range of temperatures; chemical exchange is slow at –80 °C and each mol of shift reagent is found to co-ordinate 2·0 ± 0·2 mol of dimethyl sulphoxide, corresponding to a co-ordination number of 8 for the europium ion.Keywords
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