99299-77-1Relevant academic research and scientific papers
Photochemical reactions of [(η5-C5R5)Re(CO)3] (R = Me or H) with aryl halides in benzene: Stoichiometric formation of biphenyl
Zhu, Bolin,Huang, Xinwei,Hao, Xiaoting
, p. 5932 - 5939 (2015/02/18)
Photolysis of [Cp ??Re(CO)3] (Cp? = η5-C5Me5) with bromobenzene or chlorobenzene in benzene results in biphenyl and the corresponding rhenium hydride halide complex trans-[Cp?Re(CO)2H(X)], which further converts into the dihalide complexes cis/trans-[Cp?Re(CO)2X2] (X = Br, Cl). Additional experiments, including isotopic labeling experiments, indicate that one phenyl ring in biphenyl comes from the aryl halide and the other one comes from solvent benzene. Photolysis of [CpRe(CO)3] (Cp = η5-C5H5) with aryl halide in benzene similarly generates biphenyl, the corresponding rhenium hydride halide complex. Furthermore, the reaction also affords small amounts of rhenium dihydride complex [CpRe(CO)2H2]. Plausible mechanisms for the formation of the different types of products are proposed that involve intermolecular C-X and C-H activation. Molecular structures of trans-[Cp?Re(CO)2(Br)(Cl)] (trans-6) and trans-[CpRe(CO)2(Br)(Cl)] (trans-12) determined by X-ray diffraction are also presented.
