Abstract
The C(carbene)N(amino)N(amine)-pincer nickel(II) bromides 1a–c were hydrogenated to the corresponding nickel(II) hydrides 2a–c by (EtO)3SiH/NaOtBu or NaBH4. These nickel(II) hydrides 2a–c were characterized by NMR and IR spectroscopy as well as X-ray diffraction. The catalytic performance of complex 2b for hydrodehalogenation reactions was explored. With a combination of 3 mol % catalyst loading, (EtO)3SiH/NaOtBu/toluene/80 °C and different reaction times, organic halides were successfully reduced to the related alkanes. A catalytic radical mechanism is proposed and partially verified by experiments.
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