Ejecting electrons from negative ions using light can create structures that very closely resemble the transition states of bimolecular reactions. Now, using this technique, trapped quantum states, or 'resonances', have been observed in a seven-atom reaction, and theory has been shown to be up to the task of capturing such complex phenomena.
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Continetti, R. The view from a transition state. Nature Chem 9, 931–932 (2017). https://doi.org/10.1038/nchem.2868
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DOI: https://doi.org/10.1038/nchem.2868
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