Tetrahedron Letters p. 2271 - 2274 (1992)
Update date:2022-08-11
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The conformational behavior of the 2-(diphenylphosphinoyl)-1,3-dithiane was studied in the 258-323 K temperature range. Plots of ln K versus 1/T are linear, permitting evaluation of the enthalpic and entropic contributions of the S-C-P(O) anomeric effect. Comparison with the corresponding thermodynamic data in the cyclohexyl analogue allows estimation of the enthalpic anomeric effect in this system: ca. 3.4 kcal/mol.
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