Vibrational Tuning of the Hydrogen Transfer in Malonaldehyde - A combined FTIR and Raman Jet Study
Citable Link (URL):http://resolver.sub.uni-goettingen.de/purl?gs-1/8922
Tunneling splittings in vibrationally excited malonaldehyde are derived from complementary FTIR and Raman spectra utilizing jet cooling and matrix isolation. Values from 0 to 69 cm−1 (i. e. from complete quenching of the proton tunneling to an acceleration by a factor of 3) are firmly assigned, underscoring a strong coupling between hydrogen transfer and vibrational excitation. More tentative assignments involve even larger effects for the O· · ·O breathing vibration. The results are discussed with respect to the corresponding normal modes and compared to previous theoretical predictions.