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- W2079084272 abstract "The synthesis and spectroscopic characteristics of M(CO)4(η2-C2H2) (M = Os, 1a; Ru, 1b) are presented. The compounds readily react with the parent pentacarbonyls to yield the dimetallacyclic compounds Os2(CO)8(μ-C2H2) (2) and MRu(CO)8(μ-C2H2CO) (M = Os, 3; Ru, 4). The structure of the compounds, based on IR and 13C NMR spectroscopies, including extensive 13C labeling, depends on the M(CO)5. Kinetic studies of the formation of 2 and 3 show that, in both cases, the reaction is slowed by the addition of free CO, but the inhibition is much greater with Os(CO)5. The initial step is dissociation of CO from Os(CO)4(η2-C2H2), and the inhibition results from the competition between the reverse of this dissociation and reaction of the unsaturated intermediate with Os(CO)5 or Ru(CO)5. With CO added to the system, subsequent steps in the condensation may become rate-limiting. Studies of the Ru(CO)5/Os(CO)4(η2-C2H2) system with 13CO-enriched reactants reveal further details about the course of the reaction." @default.
- W2079084272 created "2016-06-24" @default.
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- W2079084272 date "2000-06-16" @default.
- W2079084272 modified "2023-10-18" @default.
- W2079084272 title "Dimetallacycles from Monomeric 18-Electron M(CO)<sub>4</sub>(η<sup>1</sup>-C<sub>2</sub>H<sub>2</sub>) and M(CO)<sub>5</sub> (M = Ru, Os) Building Blocks: Synthesis and Mechanism of Formation" @default.
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- W2079084272 doi "https://doi.org/10.1021/om0000515" @default.
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