ArticleJournal of the American Chemical Society2026
Time-Resolved Resonant Inelastic X-ray Scattering Reveals How Orbital Symmetry Alignment Enables C-H Activation.
Article in Journal of the American Chemical Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Photochemical C-H activation reactions mediated by transition metal complexes often proceed via the formation of σ-complexes. In these intermediates, the metal center coordinates to a C-H σ-bond, and metal-ligand donation and back-donation interactions ultimately lead to C-H bond cleavage. Because metal-alkane σ-complexes are weakly bond and short-lived, current experimental methods provide limited access to the transient electronic-structure effects that control their reactivity. Here, we photochemically prepared three different types of Rh-alkane σ-complexes in solution and demonstrate how optical pump and X-ray probe spectroscopy gives access to their decisive valence-electron interactions. With femtosecond-resolution and Rh specific X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS) at the Rh L
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