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Kinetics on the Reaction of 1-Adamantyl Fluoroformate with Substituted Pyridines
Kinetics on the Reaction of 1-Adamantyl Fluoroformate with Substituted Pyridines
Park, Byoung Chun;Park, Soo Hyun;Kyong, Jin Burm;Kim, Chang Bae
Journal of the Korean Chemical Society. 1999. Aug, 43(4): 456-460
DOI : http://dx.doi.org/
  • Published : August 00, 1999
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Park, Byoung Chun
Park, Soo Hyun
Kyong, Jin Burm
Kim, Chang Bae
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Park, Byoung Chun
Park, Soo Hyun
Kyong, Jin Burm
Kim, Chang Bae
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Abstract
Rates of 1-adamantyl fluoroformate with substituted pyridines ($3-CH_3,\;4-CH_3,\;H,\;3-Cl,\;3,4-(CH_3)_2,\;3,5-(CH_3)_2$) in methanol have been measured by conductometric method at various temperatures and concentrations. The activation parameters (${\Delta}H^{\neq},\;{\Delta}S^{\neq}$) and Hammett reaction constant (${\rho}$) or Bronsted coefficient (${\beta}$) were evaluated from rate constants. The activation entropies are large and negative, and the activation enthalpies are small and positive. The Hammett reaction constant (${\rho}$) and Bronsted coefficient (${\beta}$) values were -4.15 and 0.63, respectively. From the above results, it may be concluded that this reaction proceeds to a concerted displacement mechanism in methanol.??????????ͻ????��????���?
Citing 'Kinetics on the Reaction of 1-Adamantyl Fluoroformate with Substituted Pyridines '
@article{ JCGMDC_1999_v43n4_456} ,title={Kinetics on the Reaction of 1-Adamantyl Fluoroformate with Substituted Pyridines} ,volume={4} , number= {4} , journal={Journal of the Korean Chemical Society} , publisher={Korean Chemical Society} , author={Byoung Chun, Park and Soo Hyun, Park and Jin Burm, Kyong and Chang Bae, Kim} , year={1999} , month={Aug}