• Title/Summary/Keyword: Chemical mechanism

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Photodecomposition Mechanism of 2-Methoxy-1,2-diphenyl Diazoethane

  • Seong, Dae Dong;Im, Gwi Taek;Kim, Min Sik;Park, Dong Gyu
    • Bulletin of the Korean Chemical Society
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    • v.16 no.1
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    • pp.47-52
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    • 1995

  • The mechanism of the photodecomposition of 2-methoxy-1,2-diphenyl diazoethane has been investigated in methanol and isoprene using time-resolved laser flash photolysis techniques. The reaction of triplet carbene which is generated from 2-methoxy-1,2-diphenyl diazoethane with methanol is believed to proceed via thermal excitation to the singlet state. The activation energy and enthalpy are consistent with a mechanism involving thermal equilibrium between the triplet and singlet state followed by the reaction of the singlet with methanol to give ether.

  • https://doi.org/10.5012/bkcs.1995.16.1.47 인용 PDF

Kinetics and Mechanism of Aminolysis of Phenyl Benzoates in Acetonitrile

  • 고한중;이호찬;이해황;이익춘
    • Bulletin of the Korean Chemical Society
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    • v.16 no.9
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    • pp.839-844
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    • 1995

  • The kinetics and mechanism of the reactions of phenyl benzoates with benzylamines and pyrrolidine are investigated in acetonitrile. The variations of ρX (ρXY>0) and ρZ (ρYZ<0) with respect to the substituent in the substrate (σY) indicate that the reactions proceed through a tetrahedral intermediate, T±, with its breakdown in the rate determining step. The large magnitudes of ρZ, ρXY and ρYZ as well as the effects of secondary kinetic isotope effects involving deuterated nucleophiles are also in line with the proposed mechanism.

  • https://doi.org/10.5012/bkcs.1995.16.9.839 인용 PDF