Abstract
The adamantyl-substituted pincer-ligand precursor AdPCP-H [(AdPCP = κ3-C6H3-2,6-(CH 2PAd2)2); Ad = 1-adamantyl] has been synthesized by the reaction of 1,3-dibromoxylene with di-1-adamantylphosphine in the presence of triethylamine. Treatment of AdPCP-H with [Ir(COD)Cl]2 (COD = 1,5-cyclooctadiene) affords the pincer-ligated complex (AdPCP)IrHCl, which was crystallographically characterized. Dehydrohalogenation of (AdPCP)IrHCl either with LiBEt3H or with KOtBu, under hydrogen atmosphere, yields the hydrides ( AdPCP)IrH2 and (AdPCP)IrH4. ( AdPCP)IrH2 catalyzes dehydrogenation of alkanes with a level of activity comparable to that of the previously reported ( tBuPCP)IrH2, while it is thermally much more robust than the tBuPCP analogue, as well as iPrPCP or tBuPOCOP pincer complexes.
| Original language | English |
|---|---|
| Pages (from-to) | 2702-2709 |
| Number of pages | 8 |
| Journal | Organometallics |
| Volume | 29 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Jun 28 2010 |
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ASJC Scopus subject areas
- Organic Chemistry
- Physical and Theoretical Chemistry
- Inorganic Chemistry
Cite this
A highly stable adamantyl-substituted pincer-ligated iridium catalyst for alkane dehydrogenation. / Punji, Benudhar; Emge, Thomas J.; Goldman, Alan S.
In: Organometallics, Vol. 29, No. 12, 28.06.2010, p. 2702-2709.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A highly stable adamantyl-substituted pincer-ligated iridium catalyst for alkane dehydrogenation
AU - Punji, Benudhar
AU - Emge, Thomas J.
AU - Goldman, Alan S
PY - 2010/6/28
Y1 - 2010/6/28
N2 - The adamantyl-substituted pincer-ligand precursor AdPCP-H [(AdPCP = κ3-C6H3-2,6-(CH 2PAd2)2); Ad = 1-adamantyl] has been synthesized by the reaction of 1,3-dibromoxylene with di-1-adamantylphosphine in the presence of triethylamine. Treatment of AdPCP-H with [Ir(COD)Cl]2 (COD = 1,5-cyclooctadiene) affords the pincer-ligated complex (AdPCP)IrHCl, which was crystallographically characterized. Dehydrohalogenation of (AdPCP)IrHCl either with LiBEt3H or with KOtBu, under hydrogen atmosphere, yields the hydrides ( AdPCP)IrH2 and (AdPCP)IrH4. ( AdPCP)IrH2 catalyzes dehydrogenation of alkanes with a level of activity comparable to that of the previously reported ( tBuPCP)IrH2, while it is thermally much more robust than the tBuPCP analogue, as well as iPrPCP or tBuPOCOP pincer complexes.
AB - The adamantyl-substituted pincer-ligand precursor AdPCP-H [(AdPCP = κ3-C6H3-2,6-(CH 2PAd2)2); Ad = 1-adamantyl] has been synthesized by the reaction of 1,3-dibromoxylene with di-1-adamantylphosphine in the presence of triethylamine. Treatment of AdPCP-H with [Ir(COD)Cl]2 (COD = 1,5-cyclooctadiene) affords the pincer-ligated complex (AdPCP)IrHCl, which was crystallographically characterized. Dehydrohalogenation of (AdPCP)IrHCl either with LiBEt3H or with KOtBu, under hydrogen atmosphere, yields the hydrides ( AdPCP)IrH2 and (AdPCP)IrH4. ( AdPCP)IrH2 catalyzes dehydrogenation of alkanes with a level of activity comparable to that of the previously reported ( tBuPCP)IrH2, while it is thermally much more robust than the tBuPCP analogue, as well as iPrPCP or tBuPOCOP pincer complexes.
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U2 - 10.1021/om100145q
DO - 10.1021/om100145q
M3 - Article
VL - 29
SP - 2702
EP - 2709
JO - Organometallics
JF - Organometallics
SN - 0276-7333
IS - 12
ER -