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Abstract The reaction of benzene with diphenylacetylene catalyzed by Rh4(CO)12 under carbon monoxide gives triphenylethylene and 2,3-diphenylindenone. The reactions of mono-/di-substituted benzenes with the acetylene also give the corresponding olefins and 2,3-diphenylindenones.
Hong et al. (Sun,) studied this question.
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