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).