A donor-stabilized silylene 4 featuring a Ni -based donating ligand was synthesized. Complex 4 exhibits a pyramidalized and nucleophilic Si center and shows a peculiar behavior due to the cooperative reactivity of Si and Ni centers. Calculations indicate that the orientation of Ni-ligands with respect to the silylene moiety is crucial in determining the role of the Ni-fragment (Lewis acid or Lewis base) towards silylene. Indeed, a simple 90° rotation of the Si-Ni bond, reverses the role of Ni, and transforms a classical silylene→Ni complex into an unprecedented Ni →silylene complex.
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| http://dx.doi.org/10.1002/anie.202201932 | DOI Listing |
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