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- W2018252484 abstract "Alkyl diphenylphosphinites (1) react rapidly with 10-methylacridinium iodide (2a) to afford the corresponding phosphonium ions (3), which gradually decompose to phosphine oxide, the expected Arbuzov product. Large difference in the rate of the first (phosphonium-forming) and the second (phosphonium-decomposing) steps enables us independent kinetic investigation for both steps, with which it has been found that the first step obeys second-order kinetics with first-order with respect to 1 and 2a, respectively. The second step proceeds according to either the SN2 mechanism when alkyl substituent in 1 is primary or secondary, in which iodide ion acts as a nucleophile, or the SN1 mechanism when the substituent is tertiary. Closer examination on the first step with activation parameters reveals that the transition state of this step becomes more reactant-like as the substituent in 1 becomes bulkier. For the second step, survey of the activation parameters shows that the breaking of the carbon–oxygen bond in 3 predominates over the formation of the oxygen–phosphorus double bond." @default.
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- W2018252484 date "1993-07-01" @default.
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- W2018252484 title "The Arbuzov Reaction of Alkyl Diphenylphosphinites with 10-Methylacridinium Ion. Kinetic Study on the Formation and the Decomposition of Phosphonium Intermediates" @default.
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- W2018252484 doi "https://doi.org/10.1246/bcsj.66.2077" @default.
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