The reactions of M^*[(R-Cp)M^1(CO)~3](R=CO~2Et,COMe;M^*=Na;R=n-Bu; M*=Li)with CpM^2FeCo(CO)~8(μ~3-S) have been carried out to give six tetrahedral chiral clusters(R-Cp)M^1CpM^2Fe(CO)~7(μ~3-S)(I-3:M^1=W, M^2=Mo, R=CO~2Et; Ⅱ:M^1=W,M^2=Mo,R=COMe;Ⅲ:M^1=W,M^2=Mo,R=n-Bu;Ⅳ-2: M^1=Mo, M^2=W,R=CO~2Et;Ⅴ:M^1=Mo,M^2=W,R=COMe; Ⅵ:M^1=Mo,M^2=W,R=n-Bu) having large substituting group in cyclopentadienyl. These clusters were characterized by elemental analyses,IR and ^1H/^1^3C NMR. The possible reaction path-ways were also discussed herewith. The cluster M*[(R-Cp) M^1(CO)~3] can give the group [(R-Cp)M^1(CO)~2](d^5ML~5) under reaction conditions,which have isolobal analogue to the group Co(CO)~3(d^9ML~3) in cluster (R-Cp)M^1CpM^2Fe(CO)~7(μ~s-S). The title clusters are derived from isolobl displacement reaction between the cluster M^*[(R-cp)M^1 (CO)~3] and (R-Cp)M^1Cp-M^2Fe(CO)~7(μ~3-S).

Key words: TETRAHEDRAL, STRUCTURE CHARACTERISTICS, CYCLOPENTADIENE P, MOLYBDENUM COMPLEX, ELEMENTAL ANALYSIS, INFRARED SPECTROPHOTOMETRY, PROTON MAGNETIC RESONANCE SPECTROMETRY, CARBONYL COMPLEX