Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Polarographic Behaviors of Copper and Cadmium Complexes with 2,2'-Bipyridine and Ethylenediamine in Acetonitrile

아세토니트릴에서 구리와 카드뮴의 2,2'-Bipyridine과 Ethylenediamine 착물에 대한 폴라로그래프적 연구

  • Park, Du Won (Department of Chemistry, College of Liberal Arts & Sciences Kyung Pook National University) ;
  • Lee Heung Lark (Department of Chemistry, College of Liberal Arts & Sciences Kyung Pook National University) ;
  • Bae Zun Ung (Department of Chemistry, College of Liberal Arts & Sciences Kyung Pook National University)
  • 박두원 (경북대학교 문리대학 화학과) ;
  • 이흥락 (경북대학교 문리대학 화학과) ;
  • 배준웅 (경북대학교 문리대학 화학과)
  • Published : 1974.06.30
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Abstract

Polarographic behaviors of copper and cadmium complexes with 2,2'-bipyridine and ethylenediamine in acetonitrile have been investigated by the DC and AC polarography. The reduction processes are estimated as follows; $Cu(II)-bipy. \;complex\;{\longrightarrow^{e^-}_{E_{1/2}\risingdotseq+0.1V}}\;Cu(I)-bipy.\;complex\;{\longrightarrow^{e^-}_{E_{1/2}=-0.43V}}\;Cu(Hg)$$Cu(II)-en.\;complex\;{\longrightarrow^{e^-}}\;Cu(I)-en.\;complex\;{times}\;{\longrightarrow^{e^-}_{E_{1/2}=-0.56V}}\;Cu(Hg)$$Cu(II)-bipy. \;complex\;{\longrightarrow^{e^-}_{E_{1/2}=-0.57V}}\;Cu(I)-bipy.\;complex\;{\longrightarrow^{2e^-}_{E_{1/2}=-0.97V}}\;Cd(I)-bipy\;complex$$Cu(II)-en.\;complex\;{\longrightarrow^{e^-}_{E_{1/2}=+0.05V}\;Cu(I)-en.\;complex{\longrightarrow^{e^-}_{E_{1/2}=-0.92V}}\;Cu(Hg)$ The limiting currents of all steps are controlled by diffusion. The number of ligand and the dissociation constant for Cu(Ⅰ)-bipy. complex were found to be n = 2 and $K_d=(1.5{\pm}0.1){\times}10^{-7}$, respectively.

물 아닌 용매 아세토니트릴에서 구리와 카드뮴의 2,2´-비피리딘(bipy.)과 에틸렌디아민(en.) 착물의 성질의 직류와 교류폴라로그래프로 조사한 결과 각 착물의 전극과정은 아래와 같이 생각된다. $Cu(II)-bipy. \;complex\;{\longrightarrow^{e^-}_{E_{1/2}\risingdotseq+0.1V}}\;Cu(I)-bipy.\;complex\;{\longrightarrow^{e^-}_{E_{1/2}=-0.43V}}\;Cu(Hg)$$Cu(II)-en.\;complex\;{\longrightarrow^{e^-}}\;Cu(I)-en.\;complex\;{times}\;{\longrightarrow^{e^-}_{E_{1/2}=-0.56V}}\;Cu(Hg)$$Cu(II)-bipy. \;complex\;{\longrightarrow^{e^-}_{E_{1/2}=-0.57V}}\;Cu(I)-bipy.\;complex\;{\longrightarrow^{2e^-}_{E_{1/2}=-0.97V}}\;Cd(I)-bipy\;complex$$Cu(II)-en.\;complex\;{\longrightarrow^{e^-}_{E_{1/2}=+0.05V}\;Cu(I)-en.\;complex{\longrightarrow^{e^-}_{E_{1/2}=-0.92V}}\;Cu(Hg)$이상의 모든 파는 학산에만 의존한다. 또 Cu(Ⅰ)-bipy. 착물의 리간드의 수는 2이며, 착물해리상수 $K_d=(1.5{\pm}0.1){\times}10^{-7}$이었다.

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References

  1. J. Amer. Chem. Soc. v.79 I. M. Kolthoff;J. F. Coezee
  2. J. Amer. Chem. Soc. v.79 I. M. Kolthoff;J. F. Coezee
  3. J. Phys. Chem. v.67 J. F. Coezee;D. K. Mcquier;J. L. Hedrick
  4. J. Amer. Chem. Soc. v.79 A. I. Popov;D. H. Geske
  5. J. Amer. Chem. Soc. v.82 R. C. Larson;R. T. Iwamoto
  6. Bull. Chem. Soc. Japan v.41 Y. Sato;N. Tanaka
  7. Bull. Chem. Soc. Japan v.41 N. Tanaka
  8. Electrochemica Acta. v.13 N. Tanaka;Y. Sato
  9. Inorg. Nucl. Chem. Letters v.2 N. Tanaka;Y. Sato
  10. Bull. Chem. Soc. Japan v.42 N. Tanaka
  11. Talanta v.12 R. Takashi
  12. Anal. Chem. v.34 J. F. Coezee
  13. Inorg. Nucl. Chem. v.23 B. Marin;W. R. Mcwhinie;G. M. Waind
  14. Ind. Eng. Chem. v.15 D. N. Hume;W. E. Harris
  15. Anal. Chem. v.34 J. F. Coezee;G. P. Cunningham;D. K. Mcguire;G. R. Padmanabham
  16. J. Amer. Chem. Soc. v.72 E. I. Onstott;H. A. Laitinen
  17. J. Amer. Chem. Soc. v.72 B. E. Douglas;H. A. Laitinen;J. C. Bailar