Double activation of the geminal carbon−hydrogen bonds in 1,3-butadiene by a diiridium complex

Author
Ristic Petrovic, Dusan
Torkelson, Jeffrey R.
Hilts, Robert
McDonald, Robert
Cowie, Martin
Faculty Advisor
Date
2000
Keywords
Transition metals , Butadiene , Metals , Hydrocarbons , Ligands
Abstract (summary)
The binuclear complex [Ir2(CH3)(CO)2(dppm)2][CF3SO3] (1) (dppm = Ph2PCH2PPh2) reacts with 1,3-butadiene at ambient temperature over a 48 h period to give the vinylvinylidene-bridged product [Ir2(CH3)(H)(CO)2(μ-H)(μ-CC(H)C(H)CH2)(dppm)2][CF3SO3] (2). At −55 °C the same reactants yield the 1,3-butadiene adduct [Ir2(CH3)(CO)2(μ-η2:η2-H2CC(H)C(H)CH2)(dppm)2][CF3SO3] (3), in which the diolefin binds in an s-trans geometry on one face of the complex. A proposal is advanced rationalizing the conversion of 3 to 2 upon warming.
Publication Information
Ristic-Petrovic, D., Torkelson, J., Hilts, R., McDonald, R., & Cowie, M. (2000). Double activation of the geminal carbon-hydrogen bonds in 1,3-butadiene by a diiridium complex. Organometallics, 19(22), 4432–4434. https://doi.org/10.1021/om0006054
DOI
Notes
Item Type
Article
Language
English
Rights
All Rights Reserved