86508-04-5Relevant academic research and scientific papers
Reactivity of [HFe3(CO)11]- toward ethylene. Synthesis and crystal structure of tetraphenylphosphonium [μ3-propionyl-C(Fe1,Fe2),O(Fe 1,Fe3)]nonacarbonyl-triangulo-triferrate. Study of its reactivity toward CO, P(C6H5)3, H2, and proton
Lourdichi, Mohamed,Pince, Robert,Dahan, Fran?oise,Mathieu, René
, p. 1417 - 1422 (2008/10/08)
Reaction of the cluster anion [HPe3(CO)11]- with ethylene at room temperature gives the trinuclear cluster anion [Fe3(CO)9(μ3-COC2H 5)]-. The structure of this cluster anion has been determined by X-ray diffraction study of the tetraphenylphosphonium salt 1. The latter is monoclinic of space group C2/c with a = 18.813 (3) A?, b = 17.641 (4) A?, c = 22.551 (4) A?, β = 106.34 (2)°, and Z = 8. The structure has been solved and refined to R and Rw values of 0.054 and 0.060, respectively, using 3583 reflections. A μ3 mode of bonding is shown for the acyl group. This is the first case where this mode of bonding results from the direct action of an alkene on a cluster unit. Reactivity of 1 toward CO and P(C6H5)3 is attended by complete rupture of the cluster unit into Fe(CO)4COC2H5- (CO case) or Fe(CO)5-n[P(C6H5)3]n (n = 1, 2). 1 gives a mixture of ethane and propanol under hydrogen pressure, which suggests an alkyl/acyl equilibrium in the cluster under the conditions of the reaction. Protonation of 1 gives HFe3(CO)9(μ3-COC2H5).
