Solvent Effect in Nucleophilic Reactions of Substituted Benzoyl Chlorides with p-Nitroaniline

치환염 벤조일과 파라니트로아닐린과의 친핵반응에 미치는 용매효과에 관한 연구

  • 김왕기 (전남대학교 사범대학 과학교육과)
  • Published : 19740800

Abstract

The rate constants for the nucleophilic substitution reactions of substituted benzoyl chlorides with p-nitroaniline in such solvents as acetone, acetonitrile, methanol, ethanol, etc. were conductometrically determined, and the activation thermodynamic parameters were also evaluated. In result, the reaction rates were faster in protic solvents than in aprotic solvent; in the solvents of similar property, the reaction rate in the solvent of the large dielectric constant was faster than that in the solvent of the small dielectric constant. Hammett plots in individual solvents showed the straight lines with positive slope; and we concluded that the reaction occurred via the addition-elimination mechanism.

아세톤, 아세토니트릴, 메탄올, 에탄올 등의 용매에서 치환염 벤조일과 파라니트로아닐린과의 친핵치환반응에 대한 속도상수를 전기 전도도법으로 구하고 활성화 파라미터를 계산하였다. 결과로 반양성자 용매보다는 양성자성 용매에서 반응속도가 빨랐고 같은 성질의 용매에서는 유전상수가 큰 쪽이 반응이 더 빨랐으며 각 용매에 있어서의 Hammett도시는 정의 기울기를 가진 직선을 나타내었으며, 반응은 첨가-제거 메카니즘으로 일어났다.

Keywords

References

  1. J. Chem. Soc. E.D. Hughes;C.K. Ingold
  2. J. Amer. Chem. Soc. v.70 E. Grunwald;S. Winstein
  3. J. Amer. Chem. Soc. v.73 E. Grunwald;S. Winstein
  4. Kinetics and Mechanism A.A. Frost;R.C. Pearson
  5. J. Chem. Soc. L. Auther;R.F. Hudson
  6. J. Chem. Soc. D.A. Brown;R.F. Hudson
  7. J. Chem. Soc. R.F. Hudson;G.E. Moss
  8. J. Amer. Chem. Soc. v.85 M.L. Bender;M.C. Chen
  9. Chem. Rev. v.60 M.L. Bender
  10. Bull. Chem. Soc. Japan v.37 M. Minato
  11. J. Korean Chem. Soc. v.17 Ikchoon Lee;Wang Ki Kim
  12. Phil. Meg. v.2 E.A. Guggenheim
  13. J. Chem. Phys. v.2 J.G. Kirkwood
  14. Kinetics and Mechanism A.A. Frost;R.G. Pearson
  15. J. Korean Chem. Soc. v.17 Wang Ki Kim;Ikchoon Lee
  16. J. Korean Chem. Soc. v.18 Wang Ki Kim;Ikchoon Lee
  17. Phys. Org. Chem. L.P. Hammett
  18. Chem. Rev. v.59 M.L. Bender
  19. Organic Reactivity USSR v.5 L.M. Litvinenko(et al.)
  20. Organic Reactivity USSR v.5 V.A. Savelova;L.M. Livinenko
  21. Mechanism in Organic Chemistry R.W. Alder;R. Baker;J.M. Brown