Transition Metal Chemistry

, 33:879 | Cite as

Synthesis, structure, and electrochemistry of trans-[CoIII{(BA)2pn}(L)2]ClO4 complexes

  • Soraia Meghdadi
  • Mehdi Amirnasr
  • Mohammad H. Habibi
  • Ahmad Amiri
  • Fatemeh Ahmadi
  • Keiko Kihara
  • Takayoshi Suzuki
  • Hamid Reza Bijanzadeh


The structure, spectroscopic, and electrochemical properties of [Co{(BA)2pn}(L)2]ClO4 complexes, where (BA)2pn = N,N′-bis(benzoylacetone)-1,3-propylenediimine dianion and the two ancillary ligands (L) are pyridine, py (1), and 4-methylpyridine, 4-Mepy (2), have been investigated. These complexes have been characterized by elemental analyses, IR, UV–Vis and 1H-NMR spectroscopy. The crystal structure of [Co{(BA)2pn}(py)2]ClO4 (1) has been determined by X-ray diffraction. The coordination geometry around cobalt(III) is best described as a distorted octahedron. The electrochemical reduction of these complexes at a glassy carbon electrode in acetonitrile solution indicates that the first reduction process corresponding to CoIII–CoII is electrochemically irreversible, which is accompanied by the dissociation of the axial N(py)–cobalt bonds. This process becomes quasi-reversible upon the addition of excess py ligands. The second reduction step of CoII/I shows reversible behavior and is not influenced by the nature of the axial ligands.


Schiff Base Ligand Axial Ligand Cobalt Complex Schiff Base Complex Ancillary Ligand 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Partial support of this work by the Isfahan University of Technology Research Council is gratefully acknowledged.

Supplementary material

11243_2008_9127_MOESM1_ESM.doc (709 kb)
MOESM1 (DOC 689 kb)


  1. 1.
    Lucas RL, Zart MK, Murkerjee J, Sorrell TN, Powell DR, Borovik AS (2006) J Am Chem Soc 128:15476. doi: 10.1021/ja063935+ CrossRefGoogle Scholar
  2. 2.
    Nishinaga A, Tomita H (1980) J Mol Catal 7:179. doi: 10.1016/0304-5102(80)85017-6 CrossRefGoogle Scholar
  3. 3.
    Hu YJ, Huang XD, Yao ZJ, Wu YL (1998) J Org Chem 63:2456. doi: 10.1021/jo971186w CrossRefGoogle Scholar
  4. 4.
    Speiser B, Stahl H (1995) Angew Chem Int Ed Engl 34:1086. doi: 10.1002/anie.199510861 CrossRefGoogle Scholar
  5. 5.
    Niederhoffer EC, Timmons JH, Martell AE (1984) Chem Rev 84:137. doi: 10.1021/cr00060a003 CrossRefGoogle Scholar
  6. 6.
    Collman JP, Takaya H, Winkler B, Libit L, Sokoon SS, Rodley GA, Robinson WT (1973) J Am Chem Soc 95:1656. doi: 10.1021/ja00786a048 CrossRefGoogle Scholar
  7. 7.
    Bottcher A, Takeuchi T, Hardcastle KI, Meade TJ, Gray HB (1997) Inorg Chem 36:2498. doi: 10.1021/ic961146v CrossRefGoogle Scholar
  8. 8.
    Chen D, Martell AE (1987) Inorg Chem 26:1026. doi: 10.1021/ic00254a013 CrossRefGoogle Scholar
  9. 9.
    Kitaura E, Nishida Y, Okawa H, Kida S (1987) J Chem Soc Dalton Trans 12:3055. doi: 10.1039/dt9870003055 CrossRefGoogle Scholar
  10. 10.
    Kumita H, Jitsukawa K, Masuda H, Einaga H (1998) Inorg Chim Acta 283:160. doi: 10.1016/S0020-1693(98)00096-6 CrossRefGoogle Scholar
  11. 11.
    Yamada S (1999) Coord Chem Rev 190–192:537. doi: 10.1016/S0010-8545(99)00099-5 CrossRefGoogle Scholar
  12. 12.
    Dreos R, Nardin G, Randaccio L, Siega P, Tauzher G, Vrdoljak V (2003) Inorg Chim Acta 349:239. doi: 10.1016/S0020-1693(03)00038-0 CrossRefGoogle Scholar
  13. 13.
    Anthonysamy A, Balasubramanian S (2005) Inorg Chem Commun 8:908. doi: 10.1016/j.inoche.2005.06.026 CrossRefGoogle Scholar
  14. 14.
    Ziessel R (2001) Coord Chem Rev 216–217:195. doi: 10.1016/S0010-8545(00)00410-0 CrossRefGoogle Scholar
  15. 15.
    Sahoo SK, Muthu SE, Baral M, Kanungo BK (2006) Spectro Chim Acta A 63:574. doi: 10.1016/j.saa.2005.06.014 CrossRefGoogle Scholar
  16. 16.
    Chen D, Martell AE, Sun Y (1989) Inorg Chem 28:2647. doi: 10.1021/ic00312a029 CrossRefGoogle Scholar
  17. 17.
    Rybak-Akimova EV, Otto W, Deardorf P, Roesner R, Busch DH (1997) Inorg Chem 36:2746. doi: 10.1021/ic961371c CrossRefGoogle Scholar
  18. 18.
    Katsuki T (2004) Chem Soc Rev 33:437. doi: 10.1039/b304133f CrossRefGoogle Scholar
  19. 19.
    Mitra K, Biswas S, Lucas CR, Adhikary B (2006) Inorg Chim Acta 359:1997. doi: 10.1016/j.ica.2006.01.013 CrossRefGoogle Scholar
  20. 20.
    Amirnasr M, Schenk KJ, Gorji AR, Vafazadeh R (2001) Polyhedron 20:695. doi: 10.1016/S0378-3758(01)00095-7 CrossRefGoogle Scholar
  21. 21.
    Amirnasr M, Vafazadeh R, Mahmoudkhani A (2002) Can J Chem 80:1196. doi: 10.1139/v02-122 CrossRefGoogle Scholar
  22. 22.
    Amirnasr M, Langer V, Rasouli N, Salehi M, Meghdadi S (2005) Can J Chem 83:2073. doi: 10.1139/v05-207 CrossRefGoogle Scholar
  23. 23.
    Schenk KJ, Meghdadi S, Amirnasr M, Habibi MH, Amiri A, Salehi M, Kashi A (2007) Polyhedron 26:5448. doi: 10.1016/j.poly.2007.08.012 CrossRefGoogle Scholar
  24. 24.
    McCarty PJ, Hovey RJ, Ueno K, Martell AE (1955) J Am Chem Soc 77:5820. doi: 10.1021/ja01627a011 CrossRefGoogle Scholar
  25. 25.
    Connelly NG, Geiger WE (1996) Chem Rev 96:877. doi: 10.1021/cr940053x CrossRefGoogle Scholar
  26. 26.
    Higashi T (1999) Shape program for absorption. Rigaku Corporation, TokyoGoogle Scholar
  27. 27.
    Burla MC, Caliandro R, Camalli M, Carrozzini B, Cascarano GL, De Caro L, Giacovazzo C, Polidori G, Spagna R (2005) SIR2004. J Appl Cryst 38:381. doi: 10.1107/S002188980403225X CrossRefGoogle Scholar
  28. 28.
    Sheldrich GM (1997) SHELXL97. University of Göttingen, GermanyGoogle Scholar
  29. 29.
    Flack HD (1983) Acta Cryst A 39:876–881. doi: 10.1107/S0108767383001762 CrossRefGoogle Scholar
  30. 30.
    CrystalStructure 3.8: Crystal Structure Analysis Package, Rigaku and Rigaku Americas (2000–2007). 9009 New Trails Dr. The Woodlands, TX 77381, USAGoogle Scholar
  31. 31.
    Lindoy FL, Louie HW (1981) Inorg Chem 20:4186. doi: 10.1021/ic50226a032 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Soraia Meghdadi
    • 1
  • Mehdi Amirnasr
    • 1
  • Mohammad H. Habibi
    • 2
  • Ahmad Amiri
    • 1
  • Fatemeh Ahmadi
    • 1
  • Keiko Kihara
    • 3
  • Takayoshi Suzuki
    • 3
  • Hamid Reza Bijanzadeh
    • 4
  1. 1.Department of ChemistryIsfahan University of TechnologyIsfahanIran
  2. 2.Department of ChemistryUniversity of IsfahanIsfahanIran
  3. 3.Department of Chemistry, Faculty of ScienceOkayama UniversityOkayamaJapan
  4. 4.Department of ChemistryTarbiat Modarres UniversityTehranIran

Personalised recommendations