Nandita Biswas, Rajarshi Mondal, Kamal Uddin Ansari, Roaa Yaseen, Richard L. Lord, Stanislav Groysman, Daphna Shimon, Dmitri Gelman
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Abstract
This article presents the synthesis and characterization of a series of robust high-valent organometallic nickel (Ni) complexes stabilized by a functionalized PC(sp3)P pincer ligand. Notably, the nickel center, covalently confined within the 3D ligand framework, demonstrates predictable coordination and redox behavior, coupled with remarkable stability across oxidation states +2, +3, and +4. These states were found to interconvert via one-electron transfer reactions. Among these complexes, the Ni(III)-PC(sp3)P species was identified as an efficient catalyst for the mild and selective hydrosilylation of alkenes, operating through a nonoxidative reaction mechanism.
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