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Supramolecular architectures of copper(II) halide complexes with amine and lactame derivatives of pyrazine and pyrimidine

Despite of many robust and reliable supramolecular synthetic strategies that were developed for the organic solid-state systems, [1] targeting specific topologies remains one of the main challenges that the crystal engineering community deals with. That is especially true for the metal- organic systems which have so far received much less attention than their organic counterparts. Those metal-organic systems readily display (at least) two-acceptor systems where the acceptor sites form the organic functionality and the charge-balancing entity compete for the same hydrogen/halogen bond donors. And those rivalries make the assembly process in the metalorganic setting far less predictable.[2-3] Having this in the mind, we opted to explore potential transferability of already established supramolecular strategies from purely organic to metalorganic systems, and at a later step to derive some structure-property relationships. For that purpose, we prepared a series of copper(II) halide coordination polymers with pyrazine and pyrimidone derivatives equipped with the amine and lactame functionalities. We have found that the involvement of halide anions as charge- compensating entities did not disrupt the intended supramolecular motifs as these remained the same as in purely organic systems. In addition to that, we have also correlated structural observation with magnetic properties.

supramolecular architectures ; copper(II) complexes ; hydrogen bonding

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