28888-35-9Relevant academic research and scientific papers
An Efficient Aerobic Oxidation of Isobutane to t-Butyl Alcohol by N-Hydroxyphthalimide Combined with Co(II) Species
Sakaguchi, Satoshi,Kato, Susumu,Iwahama, Takahiro,Ishii, Yasutaka
, p. 1237 - 1240 (1998)
Highly selective aerobic oxidation of isobutane to t-butyl alcohol was successfully achieved by the use of a radical catalyst, N-hydroxyphthalimide (NHPI) in the presence of Co(II) salt under relatively mild conditions. The oxidation of isobutane by NHPI combined with Co(acac)2 under a pressure of air (10 atm) in benzonitrile at 100°C gave t-butyl alcohol in high yield (84%) along with acetone (13%). The reaction is thought to proceed via hydrogen abstraction from isobutane by the phthalimidooxyl radical (PINO). which seems to be a key active species. The formation of acetone can be explained by a partial β-scission of the t-butoxy radical, generated from the redox decomposition of t-butyl hydroperoxide by cobalt ion. Alkyl-substituted butanes and pentanes were difficult to be oxidized selectively under these conditions because of easy degradation to smaller fragments of the resulting alkoxyl radical intermediates.
OH Radical Induced Oxidation of 2,3-Dimethylbutane in Air
Heimann, Gerald,Warneck, Peter
, p. 8403 - 8409 (2007/10/02)
The product distribution resulting from the OH induced oxidation of 2,3-dimethylbutane in air was measured and compared with predictions based on a general reaction mechanism.Relative rates derived for the abstraction of primary and tertiary hydrogen atoms by OH radicals from the parent compound are 17percent and 83percent, respectively.The branching ratio for the alcohol versus alkoxyl radical producing pathsways of the self-reaction of 2-propylperoxy radicals was determined to be (0.61 +/- 0.08):(0.39 +/- 0.08); the corresponding ratio for the self-reaction of primary 2,3-dimethylbutylperoxy radicals is (0.56 +/- 0.07): 0.44 +/- 0.07).Large amounts of 2,3-dimethyl-2-hydroperoxybutane and small amounts of 2,3-dimethyl-2-butanol were found, the latter as a product of the cross combination reactions of 2,3-dimethyl-2-butylperoxy with 2-propylperoxy and 2,3-dimethyl-1-butylperoxy radicals.Rate constants of 3.5 * 10-17 and 2 * 10-16 cm-3/(molecule s), respectively, were estimated for these reactions with the help of computer simulations.
