Salt‐Free Reduction of Nonprecious Transition‐Metal Compounds: Generation of Amorphous Ni Nanoparticles for Catalytic C–C Bond Formation |
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| Authors: | Dr Taiga Yurino Yohei Ueda Dr Yoshiki Shimizu Dr Shinji Tanaka Haruka Nishiyama Prof Dr Hayato Tsurugi Prof Dr Kazuhiko Sato Prof Dr Kazushi Mashima |
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| Institution: | 1. Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka (Japan);2. Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Tsukuba, Ibaraki (Japan);3. Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Tsukuba, Ibaraki (Japan) |
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| Abstract: | A salt‐free procedure for the generation of a wide variety of metal(0) particles, including Fe, Co, Ni, and Cu, was achieved using 2,3,5,6‐tetramethyl‐1,4‐bis(trimethylsilyl)‐1,4‐diaza‐2,5‐cyclohexadiene ( 1 ), which reduced the corresponding metal precursors under mild conditions. Notably, Ni particles formed in situ from the treatment of Ni(acac)2 (acac=acetylacetonate) with 1 in toluene exhibited significant catalytic activity for reductive C? C bond‐forming reactions of aryl halides in the presence of excess amounts of 1 . By examination of high‐magnification transmission electron microscopy images and electron diffraction patterns, we concluded that amorphous Ni nanoparticles (Ni aNPs) were essential for the high catalytic activity. |
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| Keywords: | C C coupling nanoparticles nickel organosilicon compounds reductive coupling |
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