Special Organic Seminar: Tunneling in Intra- and Intermolecular Reactions

Seminar series
Organic Colloquium
Tue, Aug 6 4:00pm
Cram Conference Room – 3440 Mol Sci
Speaker Professor Wolfram Sander
Ruhr-Universität Bochum
Graduate School of Chemistry and Biochemistry

Special Organic Seminar

"Tunneling in Intra- and Intermolecular Reactions"

Abstract.  Quantum chemical tunneling (QMT) is an important process that can influence reaction rates of hydrogen atom transfer, but also of larger (“heavy”) atoms such as carbon.  During the last years, a number of molecules were described that are only metastable, and even at cryogenic temperatures rearrange via tunneling processes.  Since tunneling rates are almost independent of temperature, QMT becomes rate determining for these reactions at low temperature, when classical thermal barriers are prohibitively high.

In the lecture, examples for three types of tunneling reactions will be presented:

- Intramolecular hydrogen transfer

- Intermolecular hydrogen transfer

- Heavy atom tunneling

In particular, the role of QMT in reactions of carbenes with molecular hydrogen will be discussed.  These reactions can serve as model reactions for the activation of H2.