Summary
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1.
At 190° and 1–20 atm in presence of a Co-ThO2-kieselguhr catalyst (100∶18∶100) benzene in admixture with carbon monoxide and hydrogen forms small amounts of cycloheptatriene.
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2.
Under these conditions cycloheptatriene undergoes reaction to an almost quantitative extent.
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3.
The cycloheptatriene is probably formed by the reaction of benzene with methylene radicals formed by the incomplete reduction of carbon monoxide with hydrogen.
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Éidus, Y.T., Nefedov, B.K. & Vol'pin, M.E. Formation of cycloheptatriene from benzene, carbon monoxide, and hydrogen over a cobalt catalyst. Russ Chem Bull 12, 490–492 (1963). https://doi.org/10.1007/BF00844410
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DOI: https://doi.org/10.1007/BF00844410