This study focuses on the ability of several commercially available cobalt(II) sulfide polymorphs to catalyze the reduction of nitrobenzene derivatives. Three crystalline polymorphs (CoS, CoS2, and Co6S5) were studied and compared with previous results using amorphous Co3S4. The reduction using CoS and Co6S5 was only partial, with approximately 30% of the corresponding nitrobenzene derivative recovered unreacted. Preliminary results suggest that complete reduction to aniline derivatives is obtained using CoS2. However, the isolated yields were lower compared to the use of amorphous Co3S4. The correlation between crystalline structure and reactivity will be presented.

Reduction of nitrobenzene derivatives using crystalline polymorphs of cobalt(II) sulfide and sodium borohydride

249th National Meeting (2015)

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