Donor numbers: 27Al quadrupole relaxation as a measure of solvent donicity towards the sodium ion
Open Access
- 1 August 1983
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 61 (8) , 1719-1721
- https://doi.org/10.1139/v83-293
Abstract
A new method is presented for the determination of solvent donicity towards the sodium ion that avoids solvent–solvent interactions. Using the systemNaAlEt4–benzene–donorthe response of the 27Al quadrupole relaxation to anion symmetry as a function of donor: Na+ ratio is monitored by both 27Al line widths and methylene 1H absorptions. The assumption is made that anion symmetry is dependent on the cation–anion interaction which is dependent on the stability of the donor–Na+ solvates. The ordering of donors is found to differ from the generally accepted listing. A ranking of seventeen donors is given.Keywords
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