Synthesis and reaction of new metal cluster complexes containing a WRuCoSe core

Several chiral cluster derivatives, RuCoW(mu(3)-Se)(CO)(8) {eta(5)-C5H4C(O)R} [R = H (2), CH3 (3), C6H4 (4), C6H4C(O)OCH3 (5)], were synthesized by reaction of the precursor (mu(3)-Se)RuCo2(CO)(9) (1) with the functionally substituted cyclopentadienyl tricarbonyl metal complex anions [W(CO)(3){eta(5)-C5H4C(O)R}](-) without using benzophenone ketyl. A new double-tetrahedral cluster compound, p-[(mu(3)-Se)(CO)(8)RuCoW(eta(5)-C5H4C(O))](2)C6H4 (6), was obtained by treating (1) with a metal exchange reagent, Na-2[W(CO)(3)(eta(5)C(5)H(4))C(O)C6H4C(O)(eta(5)-C5H4)}(CO)(3)W]. Cluster (3) reacted with NaBH4 in MeOH to give the secondary alcohal cluster RuCoW(mu(3-)Se)(CO)(8){eta(5)-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 (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) Angstrom, b = 18.231(4) Angstrom, c = 15.956(3) Angstrom, V = 7658(4) Angstrom(3), Z = 16, R = 0.029 and R-w = 0.036.