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- W2512587412 abstract "The cationic rhodium complex [Rh(PcPr3)2(η6-PhF)]+[B{3,5-(CF3)2C6H3}4]− (PcPr3 = triscyclopropylphosphine, PhF = fluorobenzene) was used as a catalyst for the hydrogenation of the charge-tagged alkyne [Ph3P(CH2)4C2H]+[PF6]−. Pressurized sample infusion electrospray ionization mass spectrometry (PSI-ESI-MS) was used to monitor reaction progress. Experiments revealed that the reaction is first order in catalyst and first order in hydrogen, so under conditions of excess hydrogen the reaction is pseudo-zero order. Alkyne hydrogenation was 40 times faster than alkene hydrogenation. The turnover-limiting step is proposed to be oxidative addition of hydrogen to the alkyne (or alkene)-bound complex. Addition of triethylamine caused a dramatic reduction in rate, suggesting a deprotonation pathway was not operative." @default.
- W2512587412 created "2016-09-16" @default.
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- W2512587412 date "2015-06-09" @default.
- W2512587412 modified "2023-10-16" @default.
- W2512587412 title "Rhodium-Catalyzed Selective Partial Hydrogenation of Alkynes" @default.
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- W2512587412 doi "https://doi.org/10.1021/acs.organomet.5b00322" @default.
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