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Proton tunnelling in the intramolecular hydrogen bond of 9-Hydroxyphenalenone

Weihrich, Richard ; Limage, M. H. ; Parker, S. F. ; Fillaux, F.


Inelastic neutron scattering spectra of the 9-hydroxyphenalenone and ring deuterated analogue reveal an intense band at 91 cm−1 with all characteristics anticipated for a tunnelling the transition of a (quasi)symmetric double minimum potential for proton transfer along the intramolecular hydrogen bond. This frequency is compared to those previously reported for similar systems.

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