Fluoride‐Fluoride Association in Aqueous Solution from F19 Nuclear Magnetic Relaxation Data

Abstract

AbstractExperimental F19 nuclear magnetic relaxation rates in alkali metal fluoride solutions in D2O are reported as a function of the concentration. In these solutions a remarkable excess relaxation effect appears which can only be due to the strong magnetic dipole‐dipole interaction between two F19 nuclei in relatively close contact. The experimental data may be explained in terms of a F− F− pair distribution function which is characterized by the parameters: Closest F− F− separation a = 3 A; first coordination number of F− with respect to F−: na = 1.