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In the present work, a quantum mechanical calculation was clarified as to how the ylides exist in solution as a mixture of two geometrical isomers (Z- and E-) in a major or minor form. In addition, kinetic studies were undertaken for the reaction between triphenylphosphine, di-tert-butyl acetylenedicarboxylate in the presence of a protic/nucleophilic reagent, such as acetyl acetone. To determine the...
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