Abstract
The first examples of stable metal complexes with coordinated ethylene and carbon dioxide ligands are reported. Reaction of tris(ethylene) complexes mer-M(C2H4)3(PNP) (M = Mo and W; PNP = 2,6-bis(diphenylphosphinomethyl)pyridine) with CO2 yields the corresponding, mixed cis-M(C2H4)2(CO2)(PNP) derivatives. X-ray studies reveal six-coordinate structures exhibiting η2-ethylene and κ2-C,O carbon dioxide coordination. Remarkably, the formation of the molybdenum CO2 adduct occurs also in the solid state at room temperature, under 4 bar of CO2, in a nearly quantitative manner.
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