10.1021/acs.organomet.5b00213.s001 Daniel S. Levine Daniel S. Levine T. Don Tilley T. Don Tilley Richard A. Andersen Richard A. Andersen C–H Bond Activations by Monoanionic, PNP-Supported Scandium Dialkyl Complexes American Chemical Society 2015 sp scandium dialkyl complexes latter case amido complexes metathesi PNP bond 2015-10-12 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/C_H_Bond_Activations_by_Monoanionic_PNP_Supported_Scandium_Dialkyl_Complexes/2123665 A series of scandium dialkyl complexes, (PNP)­ScR<sub>2</sub> (R = neopentyl, trimethylsilylmethyl), supported by the monoanionic, chelating PNP ligand (2,5-bis­(dialkylphosphinomethyl)­pyrrolide; alkyl = cyclohexyl, <i>tert</i>-butyl) was synthesized, and the reactivities of these complexes toward simple hydrocarbons was investigated. The scandium–carbon bonds undergo σ-bond metathesis reactions with hydrogen, and these complexes are catalysts for the hydrogenation of alkenes. Reactions with primary amines led to formation of amido complexes that undergo cyclometalation via σ-bond metathesis, without involvement of an imido complex intermediate. A variety of carbon–hydrogen bonds are also activated, including sp-, sp<sup>2</sup>-, and sp<sup>3</sup>-C–H bonds (intramolecularly in the latter case).