
%0 Journal Article
%A Lincoln, SF 
%A Sandercock, AC 
%A Stranks, DR 
%T A <sup>19</sup>F nuclear magnetic resonance study of the exchange of the fluoro ligands of the tetrafluoroberyllium(II) ion
%J Australian Journal of Chemistry
%D 1977/02/01
%V 30
%N 2
%P 271-279
%K 
%R https://doi.org/10.1071/CH9770271
%U https://www.publish.csiro.au/paper/CH9770271 
%X A 19F N.M.R. study is reported of the exchange of the fluoro ligands of [BeF4]2-. The exchange rate law is:             rate = kobs4[BeF42-] = k'4[BeF42-]+ k''4[BeF42-][BeF3H2O-] where k'(298 K) = 69±3 s-1, &#916;H&#8225; = 30±3 kJ mol-1, &#916;S&#8225; = -110±10 J mol-1 K-1 and k''(298 K) = (1.6±0.5)&#215;103 dm3 mol-1 s-1, &#916;H&#8225; = 26±3 kJ mol-1, &#916;S&#8225; = - 96±9 J mol-1 K-1. The k' exchange process appears to be predominantly dissociative in nature, and the k'' exchange process apparently proceeds through a fluoro bridged species [Be2F7]2-. 
