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- W2023874426 abstract "Abstract The stereomutation rates between a pair of stable diastereomeric hydroxyphosphoranes ( 2c‐exo and 2c‐endo ) were measured by monitoring the change in the relative diastereomeric ratios and by 19 F NMR magnetization transfer. Analysis of the data gave averaged kinetic parameters of Δ H ≠ = 15.7 kcal mol −1 ; ΔS ≠ = −19.3 eu; ΔG ≠ 298 = 21.4 kcal mol −1 for interconversion in toluene‐d 8 and ΔH ≠ = 18.9 kcal mol −1 ; ΔS ≠ = 4.8 eu; ΔG ≠ 298 = 20.4 kcal mol −1 for that in pyridine. These results suggested that the ring‐opening of 2c to yield a phosphinate occurred and that the process involving the attack of the hydroxy group of this phosphinate to the phosphorus atom from the side opposite of a carbon atom was the rate‐determining step. X‐ray crystallographic analysis of their symmetric analog 2b was also carried out. © 2011 Wiley Periodicals, Inc. Heteroatom Chem 22:491–499, 2011; View this article online at wileyonlinelibrary.com . DOI 10.1002/hc.20712" @default.
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- W2023874426 date "2011-01-01" @default.
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- W2023874426 title "Stereomutation of a diastereomeric pair of 10-P-5 hydroxyphosphoranes" @default.
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- W2023874426 doi "https://doi.org/10.1002/hc.20712" @default.
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