
TY  - JOUR
A1  - Lincoln, SF 
A1  - Sandercock, AC 
A1  - Stranks, DR 
T1  - A <sup>19</sup>F nuclear magnetic resonance study of the exchange of the fluoro ligands of the tetrafluoroberyllium(II) ion
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1977
VL  - 30
IS  - 2
SP  - 271
EP  - 279
KW  - 
UR  - https://doi.org/10.1071/CH9770271 
N2  - 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-. 
ER  -

