Sigma-Bond Metathesis ·
C–H Activation Without Changing Oxidation State
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metal
Cp*₂Sc(III)
TS
four-centered
k_H/k_D
—
step
—
d⁰ metal (Sc/Lu)
M–CH₃ (existing σ)
H–CH₃ (incoming σ)
bridging β-H
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