Synthesis and Reaction of New Metal Cluster Complexes Containing a Wrucose Core

Abstract

Several chiral cluster derivatives, RuCoW(μ3Se)(CO)8{η5-C5H4C(O)R} [R = H (2), CH3 (3), C6H5 (4), C6H5C(O)OCH3 (5)], were” synthesized by reaction of the precursor (μ3-Se)RuCo2(CO)t) (1) with the functionally substituted cyclopentadienyl tricarbonyl metal complex anions [W(CO)3{η5-C5H4C(O)R}]−without using benzophenone ketyl. A new double-tetrahedral cluster compound, p-[(μ3-Se)(CO)8RuCoW(μ5-C5H4C(O))]2C6H4 (6), was obtained by treating (1) with a metal exchange reagent, Na2[W(CO)3(η5-C5H4)C(O)C6H4C(O)(η5-C5H4)}(CO)3WJ. Cluster (3) reacted with NaBH4 in MeOH to give the secondary alcohol cluster RuCoW(μ3-Se)(CO)8{η5-C5H4CH(OH)CH3} (7). The cluster (3) reacted with Na2Fe(CO)4 in refluxing THF followed by the treatment of 40% H3PO4 to yield the new cluster HRuFeW(μrSe)(CO)8{η5-C5H4C(O)CH3} (8). The structure of cluster (3) has been determined by single-crystal X-ray diffraction. Crystal data for cluster (3) give an orthorhombic space group Pbca, a - 26.326(4) Å, b = 18.231(4) Å, c = 15.956(3) Å, V = 7658(4) Å3, Z = 16, R = 0.029 and R w = 0.036.