309722-87-0Relevant academic research and scientific papers
Double activation of the geminal carbon-hydrogen bonds in 1,3-butadiene by a diiridium complex
Ristic-Petrovic, Dusan
, p. 4432 - 4434 (2000)
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- H2C=C(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.
