SYNTHESIS, CHARACTERIZATION AND REACTION OF THE CLUSTER COMPLEXES CONTAINING TETRAHEDRAL CORE MRUCOSE - THE SINGLE-CRYSTAL X-RAY STRUCTURESOF THE CLUSTERS RUCOMO(CO)(8)(MU(3)-SE)C5H4C(O)R [R = CH3, C6H4C(O)OCH3]

Several chiral cluster derivatives RuCoMo(mu(3)-Se)(CO)(8)C5H4C(O)R [R =H 2, CH3 3, C6H5 4, C6H4C(O)OCH3 5] were synthesized by the thermal r eaction of the precursor (mu(3)-Se)RuCo2(CO)(9) 1 with the functionall y substituted cyclopentadienyl tricarbonyl metal complex anions [Mo(CO )(3)(eta(5)-C5H4)C(O)R](-) without using benzophenone ketyl as initiat or. Similarly, the reaction of the novel type of dianions ta(5)-C5H4)C (O)C6H4C(O)(eta(5)C(5)H(4))](CO)(3)MO- With two molecules of cluster 1 gave a terephthaloyl(biscyclopentadienyl) bridged cluster complex (O) C6H4C(O)(eta(5)C(5)H(4))RuCoMo(CO)(8)(mu(3)-Se) 6. The cluster 3 react ed with NaBH4 in MeOH to give the secondary alcohol cluster RuCoMo(mu( 3)-Se) (CO)(8)C5H4CH(OH)CH3 7. Cluster 3 reacted with Na2Fe(CO)(4) in THF under reflux followed by acidic treatment with 40% H3PO4 to yield the new cluster HRuFeMo(mu(3)-Se)(CO)(8)C5H4C(O)CH3 8. Cluster 3 and 5 have been solved by single-crystal X-ray diffraction. Crystal data fo r cluster 3: orthorhombic, space group Pbca, a = 26.387(3) Angstrom, b = 18.273(2) Angstrom, c = 15.963(2) Angstrom, V = 7696(2) Angstrom(3) , Z = 16 and R = 0.023, wR = 0.027. Crystal data for cluster 5: tricli nic, space group P (1) over bar, a = 8.200(2) Angstrom, b = 19.631(7) Angstrom, c = 7.997(2) Angstrom, alpha = 92.50(2)degrees, beta = 108.6 6(2)degrees, gamma = 88.97(2)degrees, V = 1218.5(6) Angstrom(3), Z = 2 and R = 0.054, wR = 0.077. (C) 1998 Elsevier Science S.A. All rights reserved.