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• W2092893206 abstract "Treatment of the tetrametallic carbido−benzofuryl cluster (C5Me5)WOs3(μ4-C)(μ-H)2(μ-C8H6O)(CO)9 (1) with pressurized CO gas affords a carbido cluster (C5Me5)WOs3(μ4-C)(μ-H)(CO)11 (2) in nearly quantitative yield. The reactions of 2 with diisopropyl acetylenedicarboxylate (DPAD) are investigated. If complex 2 is first treated with Me3NO, the incorporation of DPAD at room temperature affords a cluster compound (C5Me5)WOs3(CO)10[C3H(CO2Pri)2] (3) in moderate yield, in which the allyl group is formed by hydride migration to the carbide. Complex 3 undergoes a facile metathesis to yield an isomer (4) with a different arrangement of the allyl C3 backbone. Upon thermolysis, complex 4 converts to a η6-tetramethylfulvene complex [C5Me4(CH2)]WOs3(μ-H)[C3H(CO2Pri)2](CO)9 (5) by activation of a ring-methyl in the C5Me5 ligand and a trialkylidyne cluster (C5Me5)WOs3(μ3-CH)(μ3-CCO2Pri)2(CO)9 (6) by cleavage of two allyl C−C bonds. The possible mechanism of their interconversion is discussed. If the reaction of the Me3NO-activated complex 2 and DPAD is carried out in refluxing toluene, we obtained one more compound (C5Me5)WOs3[CC2(CO2Pri)2H](CO)10 (7) in low yield, which appears to form through a secondary process involving hydride migration to the DPAD molecule instead." @default.
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• W2092893206 date "1998-04-26" @default.
• W2092893206 modified "2023-10-18" @default.
• W2092893206 title "Reactivity of the Tetrametallic Carbido Cluster (C₅Me₅)WOs₃(μ₄-C)(μ-H)(CO)₁₁ with Alkyne: Isomerization of an Allyl Fragment on a Tetrametallic Cluster Framework and Ring-Methyl Activation in the C₅Me₅ Ligand" @default.
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• W2092893206 doi "https://doi.org/10.1021/om9710677" @default.
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