| Autor: |
Pittard, K. A., Cundari, T. R., Gunnoe, T. B., Day, C. S., Petersen, J. L. |
| Zdroj: |
Organometallics; October 2005, Vol. 24 Issue: 21 p5015-5024, 10p |
| Abstrakt: |
The reaction of TpRu(CO)(NCMe)(Me) (1) and pyrrole forms TpRu(CO){κ2-N,N-(H)N&dbd;C(Me)(NC4H3)} (2). The formation of complex 2 involves the cleavage of the N−H bond and 2-position C−H bonds of pyrrole as well as a C−C bond forming step between pyrrole and the acetonitrile ligand of 1. Mechanistic studies indicate that the most likely reaction pathway involves initial metal-mediated N−H activation of pyrrole to produce TpRu(CO)(N-pyrrolyl)(NCMe) (3) followed by C−C bond formation and proton transfer. Complex 3 has been independently prepared and demonstrated to convert to 2. Computational studies support the suggested selectivity for initial N−H bond cleavage in preference to C−H bond activation. |
| Databáze: |
Supplemental Index |
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