Chromium complex compounds with bipyridine

Caution should be observed in handling this compound, as with all perchlorate salts. The tris(bipyridine)chromium(I1) perchlorate explodes violently on slow heating to 250° and can be set off by static electricity. It does not appear to be shock-sensitive on dropping an 8.8-g. steel ball from 4 ft., although the compound was tested only once. The explosive properties of related complexes have been described.16... 

Bis-bipyridine-silver complexes were found to catalyze the B-Z (with malonic acid as substrate) reaction by Kuhnert and Pehl (1981-1). The reaction was shown to proceed in a heterogeneous medium due to the insolubility of the silver complexes. When organic compounds such as citric acid and 2,4-pentanedione, ethylacetoacetate and racemic malic acid were used as substrates, the oscillatory behavior was not observed. Kuhnert and Pehl (1981-2) also observed that the bipyridine complexes of chromium and osmium catalyze the B-Z reaction. 

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