Perching arrangement

In each case consider whether the guest complexation will be of the capsular, nesting or perching type, or some other arrangement. Use this information to guess qualitatively the rate of guest complexation and decomplexation in each case. 

Another type of complexation with crown ethers is concerned with a tripod arrangement by three ether oxygens of the crown ether. We recently observed such a perching type complexation of protonated amines by the use of the above-stated azophenol crowns. 

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