✍ Scribed by Velichkova, Par Roumyana S. ;Panayotov, Ivan M.
No coin nor oath required. For personal study only.
The effect of strong π‐electron acceptors on the ion equilibrium in the system boron fluoride‐diethyl etherate (BFE)/ethylene dichloride was investigated by means of conductivity measurements. The acceptors used were tetracyanoethylene (TCNE) and 1.3.5‐trinitrobenzene (TNB) in amounts commensurate with the catalyst concentration. In the solvent used BFE behaves as a weakly dissociated electrolyte with a dissociation constant of about 1.64·10^−9^ mole/l. The electron acceptors presented increase the equivalent conductance of the system. The dissociation constants in the presence of TNB and TCNE are 2.88·10^−9^ and 3.25·10^−9^ mole/l., respectively. Plots of log λ vs. log c for each of the systems show two straight parts with different slopes, which indicates a change in the electrolyte behaviour. This relative increase in conductivity with increasing concentration can be due to association between ion pairs and free ions.
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