Analysis of the total ion–solvent encounter configurations of CIO–4 and BF–4 with Na+and Li+in water, studied by various nuclear magnetic relaxation times
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Faraday Discussions of the Chemical Society
- Vol. 64, 33-47
- https://doi.org/10.1039/dc9776400033
Abstract
From 19F magnetic relaxation rates caused by nuclear magnetic dipole–dipole interaction with 17OD2 and 16OH2, the orientation of water molecules in the hydration sphere of the structure breaking ion BF– 4 is determined. We find the radial orientation of the electric dipole moment to be very likely at high dilution, though at higher concentration marked deviations from this orientation do occur. From 19F–7Li magnetic interaction a cation–anion model distribution function was obtained; 7Li–H2O interactions lead to information on the hydration structure of Li+. 7Li and 23Na relaxation together with 35Cl and 11B relaxation, all caused by electric quadrupole interaction, within the electrostatic model theory, yield a particular electric dipole orientation for the three water molecules belonging simultaneously to the cationic and anionic hydration sphere during the process of ion encounter.Keywords
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