Bibliographic Details
| Title: |
Activation of a C−H Bond in Indene by [(COD)Rh(μ2-OH)]2†. |
| Authors: |
John E. Bercaw1, Nilay Hazari1, Jay A. Labinger1 |
| Source: |
Organometallics. Sep2009, Vol. 28 Issue 18, p5489-5492. 4p. |
| Subjects: |
Activation (Chemistry), Organorhodium compounds, Indene, Chemical bonds, Dimers, Reaction mechanisms (Chemistry), Molecular structure, Imines |
| Abstract: |
The air- and water-tolerant hydroxy-bridged rhodium dimer [(COD)Rh(μ2-OH)]2cleanly activates the aliphatic C−H bond in indene to generate [(COD)Rh(η3-indenyl)]. The mechanism involves direct coordination of indene to the dimer followed by rate-determining C−H bond cleavage, in contrast to the previously reported analogous reactions of [(diimine)M(μ2-OH)]22+(M = Pd, Pt), for which the dimer must be cleaved before rate-determining displacement of solvent by indene. Another difference is observed in the reactions with indene in the presence of acid: the Rh system generates a stable η6-indene 18-electron cation, [(COD)Rh(η6-indene)]+, that is not available for Pd and Pt, which instead form the η3-indenyl C−H activation products. The crystal structure of [(COD)Rh(η6-indene)] is reported. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
