Clusters Containing a Quadruply Bridging CO Ligand. Syntheses, Crystal Structures, and Solution Dynamics of CpWRu4(CO)14H and CpMRu4(CO)14H (M = Mo, W)
作者:Chi-Jung Su、Yun Chi、Shie-Ming Peng、Gene-Hsiang Lee
DOI:10.1021/om00009a036
日期:1995.9
The pentametal carbonyl cluster compounds CpWRu(4)(CO)(14)(mu(3)-H) (4), Cp*MoRu4(CO)(14)(mu(3)-H) (5), and Cp*WRu4(CO)(14)(mu(3)-H) (6) were obtained by condensation of Ru-3(CO)(12) with the corresponding anionic reagents [CpW(CO)(3)][PPN] and [Cp*M(CO)3][PPN] (M = Mo, W) in the ratio 3:2 in refluxing THF solution, followed by treatment with excess CF3CO2H in CH2Cl2 at room temperature. The Cp derivative 4 possesses a trigonal-bipyramidal Ru4W core in which the W atom is located at an equatorial position and the hydride lies on a WRu2 triangular face. In contrast, the Cp* derivatives 5 and 6 adopt an edge-bridged tetrahedral geometry with a tentacle Cp*M fragment bridging a Ru-Ru edge, on which the novel mu 4-eta 2-CO ligand is associated with the local butterfly Ru(3)M array (M = Mo, W). The solution dynamics of these three cluster compounds are discussed.
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