Femtosecond IR studies of alkane C-H bond activation by organometallic compounds. Direct observation of reactive intermediates in room temperature solutions

Journal Article · Wed Apr 17 04:00:00 EDT 1996 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja9541591· OSTI ID:263147

Lian, T; Bromberg, S E; Yang, H; Proulx, G; Bergman, R G; Harris, C B ^[1]

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1. Univ. of California, Berkeley, CA (United States)

In this communication, we report the femtosecond time-resolved IR spectroscopic study of the C-H bond activation reaction of Tp{sup *}Rh(CO){sub 2} (Tp{sup *} = HB-Pz{sub 3}{sup *}, Pz{sup *} = 3,5-dimethylpyrazolyl) in room temperature alkane solution. The relatively high C-H activation quantum yield of 30% for this compound has enabled us to detect several very short-lived transient intermediates that are formed during the overall C-H bond activation process. These experiments were performed with our recently completed 30 Hz femtosecond IR spectrometer with 200 fs time resolution. Our experiment represents the first direct observation of the reactive solvated monocarbonyl intermediate species that form in the C-H oxidative addition reactions at room temperature in alkane solution. A summary of our results is shown. 23 refs., 3 figs.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 263147
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 15 Vol. 118; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ACTIVATION ENERGY
ALKANES
CHEMICAL BONDS
CHEMICAL REACTION KINETICS
INFRARED SPECTRA
ORGANOMETALLIC COMPOUNDS
REACTION INTERMEDIATES
RHODIUM COMPLEXES
SOLUTIONS