The mechanism of a C-H Bond Activation reaction in roomtemperature alkane solution
Chemical reactions that break alkane carbon-hydrogen (C-H) bonds are normally carried out under conditions of high temperature and pressure because these bonds are extremely strong ({approx}100 kilocalories per mole), but certain metal complexes can activate C-H bonds in alkane solution under the mild conditions of room temperature and pressure. Time-resolved infrared experiments probing the initial femtosecond dynamics through the nano- and microsecond kinetics to the final stable products have been used to generate a detailed picture of the C-H activation reaction. Structures of all of the intermediates involved in the reaction of Tp*Rh(CO)2 (Tp* = HB-Pz3*, Pz* = 3,5-dimethylpyrazolyl) in alkane solution have been identified and assigned, and energy barriers for each reaction step from solvation to formation of the final alkylhydride product have been estimated from transient lifetimes.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Energy Research
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 899786
- Report Number(s):
- LBNL-40743; SCEHDK; TRN: US200709%%122
- Journal Information:
- Science, Vol. 278, Issue 5336; Related Information: Journal Publication Date: 10/1997; ISSN 0193-4511
- Country of Publication:
- United States
- Language:
- English
Similar Records
Femtosecond IR studies of alkane C-H bond activation
Femtosecond IR studies of alkane C-H bond activation by organometallic compounds. Direct observation of reactive intermediates in room temperature solutions