Question

The crown-guest complex is called an inclusion compound. The crown ether allows the inorganic salt to dissolve in non-polar solvents. $KMn{O}_4$ forms a complex with crown ether. In this complex, the host is ............. and the guest is ................ .

• A. $K^{⨁}$ and crown ether
• B. $MnO{{}_4}^{⊝}$ crown ether and $K^{⨁}$
• C. $MnO{{}_4}^{⊝}$ and crown ether
• D. Crown ether and $MnO{{}_4}^{⊝}$

Answer 1

Answer: (B)

$MnO{{}_4}^{⊝}$ crown ether and $K^{⨁}$

The characteristic chemistry of crown ethers involves complexation of the ether oxygens with various ionic species. and this is termed "host-guest" chemistry, with the {ether as host and the ionic species as a guest}.