Physical organic chemistry Conductivity of complex crown ether compounds
At one time, the conductivity of complex compounds of calcium, strontium and barium chlorides with crown ether in an organic solvent was measured. Measurements showed that the conductivity of the complex barium compound was very close to zero. And it seems that the complex compound of barium should dissociate, but it turned out not to be so. I wonder why this is so?
Well, apparently the stability constant of the complex is so high and the bonds are so strong that dissociation is not observed in practice
What size of crown ring was it? How does it correlate with diameter of Barium?
@chaoticgood The barium ion is as close as possible to the diameter of the crown ether cavity ~ 3 A. There is a positive correlation (R=0.90).
crown ethers are different, it’s not clear which one was discussed