| Abstract
| - The isolobal displacement reaction of tetrahedral cluster (μ3-S)FeCo2(CO)9 with isolobal reagents η5-Ph2PC5H4(CO)3MLi (M = Mo, W) in THF at about 60 °C was found to give the μ-η1:η5-Ph2PC5H4-containing tetrahedral clusters (μ-η1:η5-Ph2PC5H4)(μ3-S)MFeCo(CO)7 (1, M = Mo; 2, M = W), whereastetrahedral clusters (μ3-RC)Co3(CO)9 (R = Me, Ph) reacted with η5-Ph2PC5H4(CO)3MLi under the sameconditions to afford the corresponding tetrahedral clusters (μ-η1:η5-Ph2PC5H4)(μ3-MeC)MCo2(CO)7 (3,M = Mo; 4, M = W) and (μ-η1:η5-Ph2PC5H4)(μ3-PhC)MCo2(CO)7 (5, M = Mo; 6, M = W). However,it was found that when tetrahedral cluster CpMoCo3(CO)11 reacted with isolobal reagent η5-Ph2PC5H4(CO)3MoLi under similar conditions, the corresponding tetrahedral cluster (μ-η1:η5-Ph2PC5H4)CpMo2Co2(CO)9(7) was not produced, but instead the dinuclear complex (μ-η1:η5-Ph2PC5H4)CpMo2(CO)5 (8) was obtainedunexpectedly. While 1−6 and 8 have been characterized by elemental analysis and spectroscopy, as wellas by X-ray crystallography for 1−3 and 8, the possible pathways for formation of these products aresuggested.
- The isolobal displacement reactions of η5-Ph2PC5H4(CO)3MLi (M = Mo, W) with (μ3-S)FeCo2(CO)9 and (μ3-RC)Co3(CO)9 (R = Me, Ph) gave six new tetrahedral clusters, 1−6, whereas η5-Ph2PC5H4(CO)3MoLi reacted with CpMoCo3(CO)11 to afford the unexpected dinuclear complex 8. The possible pathways for production of these complexes are suggested.
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