Reactions of Ru3(CO)12 with 1,3-butadiene or cis-2-butene give the μ3-η3dimetalloallyl compound (β-H)Ru3(β3-η3-CHCHCMe)(CO)9 (2). Refluxing 2 with PPh3 gives the CO-substituted products (μ-H)Ru3(μ3--η3 CHCHCMe)(CO)8(PPh3) (3) and (μ3-H)Ru3(μ3-η3-CHCHCMe(CO)7(PPh3)2 (4). Single crystal X-ray diffraction studies of 2, 3 and 4 show that all have the dimetalloallyl unit. These investigations demonstrate that this unit is remarkably stable and might be expected to form on triangular arrays of metal atoms on metal surfaces.
Bibliographical noteFunding Information:
We thank Professor T. S. Ring for helpful discussions and Johnson Matthey, Inc. for a loan of R&l,. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under contract no. W-7405-Eng-82. This research was supported by the Office of Basic Energy Sciences, Chemical Sciences Division and by the Research and Development Exploratory Fund of the Ames Laboratory.