Abstract
The possibility of making metal—metal bonded heterobimetallic species by metathesis of ruthenium dichlorides with anionic carbonylates is demonstrated by the isolation of MoRu(μ-Cl)(μ-CO)(CO) 2(PPh 3) 2(η-C 5H 5) ( 1) and MnRuCl(μ-CO) 2(CO) 3(μ-dppm) 2 ( 2), obtained by action of [Mo(CO) 3(η-C 5H 5] − on RuCl 2(PPh 3) 3 and of Mn(CO) 5 − on RuCl 2(dppm) 2, respectively. In contrast, reaction of Mn(CO) 5 − with RuCl 2(PMe 3) 4 yielded an ionic species 3 containing the diruthenium cation Ru 2Cl 3(PMe 3) 6 +. More interestingly, the action of Mn(CO) 5 − on RuCl 2(PPh 3) 3 resulted in the formation of the unexpected complex MnRu(μ-PPh 2)(CO) 6(PPh 3) 2 ( 4) in which the phosphido group PPh 2 bridges the two metals; this process is shown to involve a hydride intermediate, and elimination of a molecule of benzene, both identified in the reaction mixture.
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