Calix[6]arene hexacarboxylic acid binds instantly and with low symmetry to Pb, Sr and Ba. Later a highly symmetric up-down alternating conformation emerges. The solution structures are identical to their p-tert-butylcalix[6]arene hexacarboxylic acid counterparts. With either receptor, an octahedral cage is formed around the metal. The transformation from low to high symmetry however proceeds at significantly faster rates for the de-t-butylated host.

中文翻译：

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Pb、Sr和Ba杯[6]芳烃六羧酸八面体络合：脱烷基作用的显着影响

杯[6]芳烃六羧酸立即与Pb、Sr和Ba以低对称性结合。后来出现了高度对称的上下交替构象。溶液结构与其对叔丁基杯[6]芳烃六羧酸对应物相同。对于任一接收器，在金属周围形成八面体笼。然而，对于去叔丁基化主体，从低对称性到高对称性的转变以明显更快的速率进行。