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Synthesis and Gas Occlusion of Rhodium(II) Benzoate Bridged by Pyrazine Derivatives

Abstract Rhodium(II) benzoate bridged by pyrazine derivatives occlude a large amount of N2 gas, reversibly. The maximum amounts of the occluded N2 were 1.8, 1.7, 0.5, 0.1, 1.3, and 1.3 mol per one mole of rhodium(II) salt with 2-methylpyrazine, 2,3-dimethylpyrazine, quinoxaline, 1,5-naphthyrizine, and triethylenediamine, respectively, indicating the presence of a large number of micropores in these rhodium(II) carboxylates. The porous structure which is formed by the self-assembly of linear rhodium(II) benzoate-pyrazine derivatives was deduced by analogy to the structure of rhodium(II) benzoate-pyradine reported previously.