TY - JOUR
T1 - Dehydrogenation and related reactions of alkanes catalyzed by pincerâ-iridium complexes
AU - Goldman, Alan S.
AU - Krogh-Jespersen, Karsten
AU - Brookhart, Maurice
PY - 2011/12/1
Y1 - 2011/12/1
N2 - Pincer-ligated iridium complexes catalyze the dehydrogenation of alkanes to give the corresponding alkenes. In some cases high selectivity for the terminal position of n-alkanes, to yield alpha-olefins, is observed; this selectivity is highly dependent on the nature of the pincer ligand. We have found that dehydrogenation can be usefully coupled with secondary reactions (tandem catalysis), particularly olefin metathesis, to afford an overall cycle for the metathesis of n-alkanes. More extensive dehydrogenation can result in the unprecedented homogeneously catalyzed dehydroaromatization of n-alkanes. For example, n-octane is converted to ethylbenzene and predominantly o-xylene while n-decane gives primarily o-propyltoluene as well as o-diethylbenzene and n-butylbenzene. Studies of the factors determining selectivity and the mechanism and scope of these reactions and will be discussed.
AB - Pincer-ligated iridium complexes catalyze the dehydrogenation of alkanes to give the corresponding alkenes. In some cases high selectivity for the terminal position of n-alkanes, to yield alpha-olefins, is observed; this selectivity is highly dependent on the nature of the pincer ligand. We have found that dehydrogenation can be usefully coupled with secondary reactions (tandem catalysis), particularly olefin metathesis, to afford an overall cycle for the metathesis of n-alkanes. More extensive dehydrogenation can result in the unprecedented homogeneously catalyzed dehydroaromatization of n-alkanes. For example, n-octane is converted to ethylbenzene and predominantly o-xylene while n-decane gives primarily o-propyltoluene as well as o-diethylbenzene and n-butylbenzene. Studies of the factors determining selectivity and the mechanism and scope of these reactions and will be discussed.
UR - http://www.scopus.com/inward/record.url?scp=84861033040&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861033040&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:84861033040
JO - ACS National Meeting Book of Abstracts
JF - ACS National Meeting Book of Abstracts
SN - 0065-7727
T2 - 242nd ACS National Meeting and Exposition
Y2 - 28 August 2011 through 1 September 2011
ER -