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A linear template is used to direct the synthesis of a "head-to-head" tetrapyridine in the solid state, which, in a second step, assembles with a transition-metal-ion to form a polyhedral metal-organic host with a structure that conforms to a trigonal antiprism. The application of the linear template is reminiscent of the synthetic strategy of nature.
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Hamilton et al. (2002) studied this question.
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