Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
권호 표지
DOI QR코드

DOI QR Code

Synthesis and Equilibria of Octahedral and Tetrahedral Complexes of Cobalt (II) 2,2'-Dipyridylamine

  • Paik Suh Myunghyun (Department of Chemical Education, Seoul National University) ;
  • Oh Young-Hee (Department of Chemical Education, Seoul National University)
  • Published : 1982.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Reactions of cobalt(II) chloride with 2,2'-dipyridylamine (dpa) in alcoholic solutions afford the complex of octahedral $Co(dpa)_2Cl_2{\cdot}CH_3OH$. The octahedral complex is converted to tetrahedral $Co(dpa)Cl_2$ in certain solvents or at the elevated temperature, and the tetrahedral complex is changed to the octahedral one with added dpa. The electronic spectra of the complexes in DMF, measured with various concentrations of 2,2'-dipyridylamine, establish the equilibrium; $td-Co(dpa)Cl_2+dpa_\rightleftarrows^Koh-Co(dpa)_2Cl_2$. The equilibrium constants determined by the analysis of the visible spectra are 6.4, 3.6 and 2.0 $M^{-1}$, respectively, at 25.5, 38.0 and $49.0^{\circ}C,\;with\;{\Delta}H^{\circ}\;and\;{\Delta}S^{\circ}$being -9.5 kcal/mole and -28 eu.

Keywords

References

  1. Syntheses and Physical Studies of Inorganic Compounds C.F. Bell
  2. I. Chem.Soc. H. C. A. King;E. koros,;S. M. Nelson
  3. I. Chem. Soc. H. C. A. King;E. koros,;S. M. Nelson
  4. Inorg Chem. v.11 R, D. Farina;J. H. Swinehart
  5. Inorg. Chem. v.256 W. Libus;I. Uruska
  6. J. Chem. Soc.(A) J. de O. Cabral;H. C. A. King;S. M. Nelson;T. M. Shepherd;E. koros
  7. Inorg. Chem. v.9 G. D. Howard;R. S. Marianell
  8. J. Inorg. Nuclear Chem. v.33 K. Aakbori;H. Matsuo;Y. Yamamoto
  9. Indian J. Chem. v.12 I.S. Ahuja;R. Singh
  10. Z. Anorg. Chem. v.412 H. Hennig;R. Benedix;K. Hempel;J. Reinhold
  11. J. Inorg. Nucl. Chem. v.36 J. D. Ortego;D. D. Waters;C. S. Steele
  12. J. Chem. Soc. (A) M. Goodgame
  13. J. Inorg. Nucl. Chem. W. R. Mcwhinnie
  14. Physical Methods in Inorganic Chemistry R. G. Drago
  15. The Synthesis and Characterization of Inorganic Compounds W. L. Jolly
  16. J. Chem. Soc. S. Buffagni;T. M. Dunn
  17. Advanced Inorganic Chemistry F. A. Cotton;G. Wilkinson
  18. Inorg. Chem. v.17 R. T. Meyers

Cited by

  1. 2,2′-dipyridylamine complexes of rhenium(V) vol.56, pp.16, 1982, https://doi.org/10.1080/00958970510001641691
  2. Synthesis and crystal structure of a mononuclear complex of oxorhenium (v) with 2,2′-dipyridylamine vol.57, pp.15, 1982, https://doi.org/10.1080/00958970412331302157
  3. Synthesis, Characterization, and Crystal Structure of Tetrahedral Cobalt(II) Complex with 2,2′-Biquinoline Ligand vol.41, pp.5, 2011, https://doi.org/10.1080/15533174.2011.568433