The reaction of (mu (3)-S)RuCo2(CO)(9) with functionally substituted cyclop
entadienyl tricarbonyl metal anions M(CO)(3)(C5H4C(O)R) (M = Mo, W; R = OEt
, CH2CH2COOMe) in THF under reflux gave new chiral skeleton clusters (mu (3
)-S)RuCoM(CO)(8)(C5H4C(O)R) [M=Mo, R=OEt (1); M=W, R=OEt (2); M=Mo, R=CH2CH
2COOMe (3); M=W, R=CH2CH2COOMe (4)] These complexes were characterized by e
lemental analysis, IR and H-1 NMR spectra. The molecular structure of compo
und (1) was determined by single-crystal X-ray diffraction methods.