Source:http://linkedlifedata.com/resource/pubmed/id/17132002
Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
48
|
| pubmed:dateCreated |
2006-11-29
|
| pubmed:abstractText |
Unusual reactions are reported, in which the aromatic PNP ligand (PNP = 2,6-bis-(di-tert-butylphosphinomethyl)pyridine) acts in concert with the metal in the activation of H2 and benzene, via facile aromatization/dearomatization processes of the ligand. A new, dearomatized electron-rich (PNP*)Ir(I) complex 2 (PNP* = deprotonated PNP) activates benzene to form the aromatic (PNP)Ir(I)Ph 4, which upon treatment with CO undergoes a surprising oxidation process to form (PNP*)Ir(III)(H)CO 6, involving proton migration from the ligand "arm" to the metal, with concomitant dearomatization. 4 undergoes stereoselective activation of H2 to exclusively form the trans-dihydride 7, rather than the expected cis-dihydride complex. Our evidence, including D-labeling, suggests the possibility that the Ir(I)-Ph complex is transformed to the dearomatized Ir(III)(Ph)(H) (independently prepared at low temperature), which may be the actual intermediate undergoing H2 activation.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
|
| pubmed:month |
Dec
|
| pubmed:issn |
0002-7863
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:day |
6
|
| pubmed:volume |
128
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
15390-1
|
| pubmed:dateRevised |
2008-1-17
|
| pubmed:year |
2006
|
| pubmed:articleTitle |
Metal-ligand cooperation in C-H and H2 activation by an electron-rich PNP Ir(I) system: facile ligand dearomatization-aromatization as key steps.
|
| pubmed:affiliation |
Department of Organic Chemistry and Unit of Chemical Research Support, Weizmann Institute of Science, Rehovot, 76100 Israel.
|
| pubmed:publicationType |
Journal Article
|