Syntheses and Characterizations of （η~5－C_5H_5）MoFeCo（CO）_8（μ_3－S） and （η~5－C_5H_5）_2Mo_2Fe（CO）_7（μ_3－S）：X－ray Crystal Structure of （η~5－C_5H_5）MoFeCo（CO）_8（μ_3－S）

ＳｙｎｔｈｅｓｅｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｓｏｆ（η~５－Ｃ_５Ｈ_５）ＭｏＦｅＣｏ（ＣＯ）_８（μ_３－Ｓ）ａｎｄ（η~５－Ｃ_５Ｈ_５）_２Ｍｏ_２Ｆｅ（ＣＯ）_７（μ_３－Ｓ）：Ｘ－ｒａｙＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ（η~５－Ｃ_５Ｈ_...

Syntheses and Characterizations of (η￣5-C_5H_5)MoFeCo(CO)_8(μ_3-S) and (η￣5-C_5H_5)_2Mo_2Fe(CO)_7(μ_3-S):X-ray Crystal Structure of (η￣5-C_5H_5)MoFeCo(CO)_8(μ_3-S)

The heterometallic clusters(η￣5-C_5H_5)2MoFeCo(CO)_8(μ_3-S) (1) and (η￣5-C_5H_5)_2Mo_2Fe(CO)_7(μ_3-S) (2) were synthesized by the reaction of HFe_2Co(CO)_9(μ_3-S) (3) and (η￣5-C_5H_5)Mo(CO)_3Cl(4) in refluxing tetrahydrofuran under an atmosphere of nitrogen. The reaction mechanism was proposed as metal exchange with electrophilic addition-elimination via substitution. The title clusters were characterized by elemental analyses and IR spectroscopy,while the structure of cluster 1 was determined by X-ray crystallography. Cluster 1 crystallizes in the P2_1/n space group with a= 8. 016 (1), b=17. 625(2), c=12. 068(2),β=96. 15(1)°,V=1695.1(4),Z=4 and D_c=2. 08g/cm￣3.λ(MoKα)=0. 71073,μ=26. 78 cm-1,F(000)=1032.Structure solution and refinement were based on 2002 independent reflections with I≥3.0 σ(I) and converged at R=0. 025. The CoFeMo core in cluster 1 displays a triangle with a four-electron donating sulphur atom which caps the three metals.