ENDOR evidence for the quantum exchange of the methylene protons (CROSBI ID 141422)
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Herak, Janko N.
engleski
ENDOR evidence for the quantum exchange of the methylene protons
ENDOR spectroscopy was used for studying methylene proton couplings in the 6-yl (or H-addition) radical in a single crystal of 1-methyluracil at 4.2 K. The two methylene protons were magnetically equivalent in all crystal (radical) orientations in the magnetic field, indicating proton quantum exchange. The two protons compose magnetically single entity with spin I = 1. The observed small ENDOR line splittings of about 0.60 MHz agree well with the theoretical expectations for such a system.
ENDOR; Methylene protons; Quantum exchange
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