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In addition, the reactive properties of rare earth chlorides can be adjusted according to the differences between different rare earth elements such as electronic track, ionic radius, electronegativity. Using these features of rare earth chloride, we can chose different substrates with different functional groups in the design and composition to reach the goal of synthesis of some valuable heterocyclic compounds under the presence of rare earth chlorides.
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Rare earth chloride is a kind of readily available Lewis acid. Its metal center has not only a high coordination number, but also  a high degree of affinity for a variety of hybrid atoms.
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