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Proton tunneling in the tropolone-N2 van der Waals complex

✍ Scribed by Hemant K. Sinha; Ronald P. Steer

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 666 KB
Volume: 241
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00649-o

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✦ Synopsis

Proton tunneling splitting has been measured for the S, + S, origin band of the tropolone: N, van der Waals complex by recording its laser-induced fluorescence excitation spectrum in a supersonic jet. A large decrease in the magnitude of the tunneling splitting, from 19.4 cm-' in bare tropolone to 6.0 cm-' in the 1: 1 complex, has been observed, indicating that nitrogen perturbs the reaction coordinate by significantly increasing the barrier height in the excited state. Strong coupling of the tunneling mode to the in-plane N, torsional mode is the likely source of this effect.

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