Skip to main content
Log in

Synthesis, characterization and structure of the Bis(methyl-cyclopentadienyl)vanadium(IV) carboxylates

  • Published:
Central European Journal of Chemistry

Abstract

The 1,1’-dimethylvanadocene dichloride ((C5H4CH3)2VCl2) reacts in aqueous solution with various carboxylic acids giving two different types of complexes. The 1,1’-dimethylvanadocene complexes of monocarboxylic acids (C5H4CH3)2V(OOCR)2 (R=H,CCl3, CF3, C6H5) contain two monodentate carboxylic ligands, whereas oxalic and malonic acids act as chelate compounds of the formula (C5H4CH3)2V(OOC-A-COO) (A=−, CH2). The structure of the (C5H4CH3)2 V(OOCCF3)2 complex was determined by single crystal X-ray diffraction analysis. The isotropic and anisotropic EPR spectra of all the complexes prepared were recorded. The obtained EPR parameter values were found to be in agreement with proposed structures.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. P. Köpf-Maier and H. Köpf: “Non-Platinum-Group Metal Antitumor Agents: History, Current Status, and Perspectives”, Chem. Rev., Vol. 87, (1987), pp. 1137–1152.

    Article  Google Scholar 

  2. P. Köpf-Maier: “Antitumor activity of titanocene dichloride in xenografted human renal-cell carcinoma”, Anticancer Res., Vol. 19, (1999), pp. 493–504.

    Google Scholar 

  3. K. Mross, P. Robben-Bathe, L. Edler, J. Baumgart, W. E. Berdel, H. Fiebig and C. Unger: “Phase I clinical trial of a day −1, −3, −5 every 3 weeks schedule with titanocene dichloride (MKT 5) in patients with advanced cancer: A study of the phase I study group of the Association for Medical Oncology (AIO) of the German Cancer Society”, Onkologie, Vol. 23, (2000), pp. 576–579.

    Article  Google Scholar 

  4. N. Kroger, U.R. Kleeberg, K. Mross, L. Edler, G. Sass and D.K. Hossfeld: “Phase II clinical trial of titanocene dichloride in patients with metastatic breast cancer”, Onkologie, Vol. 23, (2000), pp. 60–62.

    Article  Google Scholar 

  5. P. Ghosh, S. Ghosh, C. Navara, R.K. Narla, A. Benyumov and F.M. Uckun: “X-ray structure, solution properties, and biological activity profile of vanadocene(IV) acetylacetonate complex, [VCp2(acac)](CF3SO3): A dual-function anti-cancer agent with anti-angiogenic and anti-mitotic properties”, J. Inorg. Biochem., Vol. 84, (2001). pp. 241–253.

    Article  CAS  Google Scholar 

  6. P. Ghosh, A.T. Kotchevar, D.D. DuMez, S. Ghosh, J. Peiterson and F.M. Uckun: “Synthesis and structure of bis(π-cyclopentadeenyl)vanadium(IV) 1,10-phenanthroline and 2,2′-bipyridine compounds and their interactions with artificial membranes”, Inorg. Chem., Vol. 38, (1999), pp. 3730–3737.

    Article  CAS  Google Scholar 

  7. J.A. Belot, R.D. McCullough, A.L. Rheingold and G.P.A. Yap: “A facile and efficient method for preparing ring-alkylated vanadocenes (RCp)2V and mono- and dichlorides of ring- alkylated vanadocenes (RCp)2VCl and (RCp)2VCl2”, Organometallics, Vol. 15, (1996), pp. 5062–5065.

    Article  CAS  Google Scholar 

  8. B. Dorer, M.H. Prosenc, U. Rief and H.H. Brintzinger: “Ansa-vanadocene complexes —Syntheses, structures and ligand exchange reactions”, Collect. Czech. Chem. Commun., Vol. 62, (1997), pp. 265–278.

    Article  CAS  Google Scholar 

  9. P. Köpf-Maier, S. Grabowski, J. Liegener and H. Köpf: “New Antitumor Titanocene Derivatives Containing Hydrophilic Ligands”, Inorg. Chim. Acta-Bioinorg. Chem. Vol. 108, (1985), pp. 99–103.

    Article  Google Scholar 

  10. O.R. Allen, L. Croll, A.L. Gott, R.J. Knox and P.C. McGowan: “Functionalized cyclopentadienyl titanium organometallic compounds as new antitumor drugs”, Organometallics, Vol. 23, (2004), pp. 288–292.

    Article  CAS  Google Scholar 

  11. P.W. Causey, M.C. Baird and S.P.C. Cole: “Synthesis, Characterization, and Assessment of Cytotoxic Properties of a Series of Titanocene Dichloride Derivatives”, Organometallics, Vol. 23, (2004), pp. 4486–4494.

    Article  CAS  Google Scholar 

  12. M. Tacke, L.T. Allen, L. Cuffe, W.M. Gallagher, Y. Lou, O. Mendoza, H. Müller-Bunz, F.-J.K. Rehmann and N. Sweeney: “Novel titanocene anti-cancer drugs derived from fulvenes and titanium dichloride”, J. Organoment. Chem., Vol. 689, (2004), pp. 2242–2249.

    Article  CAS  Google Scholar 

  13. J. Honzíček, P. Nachtigall, I. Císařova and J. Vinklárek: “Synthesis, characterization and structural investigation of the first vanadocene(IV) carboxylic acid complexes prepared from the vanadocene dichloride”, J. Organomet. Chem. Vol. 689, (2004), pp. 1180–1187.

    Article  CAS  Google Scholar 

  14. J. Vinklárek, J. Honzíček and Jana Holubová: “Inclusion compounds of cystostatic active (C5H5)2VCl2 and (CH3C5H4)2VCl2 with α−, β− and γ− cyclodextrines: Synthesis, EPR study and microbiological behavior toward Escherichia coli”, Central European Journal of Chemistry, Vol. 3, (2005), pp. 72–81.

    Article  Google Scholar 

  15. J. Vinklárek, H. Paláčková and J. Honzíček: “Experimental and theoretical study of the first vanadocene(IV) complexes of α-amino acids prepared from vanadocene dichloride”, Collect. Czech. Chem. Commun., Vol. 69, (2004), pp. 811–821.

    Article  CAS  Google Scholar 

  16. I. Pavlík and J. Vinklárek: “Hydrolysis Behavior of the Antitumor Agent Vanadocene Dichloride in Strongly Acid, Neutral and Alkaline Aqueous-Media-an EPR Study”, Eur. J. Solid State Inorg. Chem., Vol. 28, (1991), pp. 815–827.

    Google Scholar 

  17. L. Phillips, A.R. Lacey and M.K. Cooper: “Analysis of Substituted Ferrocenes by Infrared-Spectroscopy”, J. Chem. Soc.-Dalton Trans., Vol., (1988), pp. 1383–1391.

  18. K. Nakamoto: “Complexes of Carboxylic Acids”, In: K. Nakamoto: Infrared and Raman Spectra of Inorganic and Coordination Compounds, Part B, 5th Ed., Wiley, New York, 1997, pp. 59–62.

    Google Scholar 

  19. K. Nakamoto: “Complexes of Oxalato and Related Ligands”, In: K. Nakamoto: Infrared and Raman Spectra of Inorganic and Coordination Compounds, Part B, 5th Ed., Wiley, New York, 1997, pp. 74–79.

    Google Scholar 

  20. Z. Náhlovská, B. Náhlovský and T.G. Strand: “Molecular Structure of Gaseous Oxalic Acid from Electron Diffraction and IR data”, Acta Chem. Scand., Vol. 24, (1970), p. 2617–2628.

    Article  Google Scholar 

  21. J. Honzíček, J. Vinklárek and P. Nachtigall: “A density functional study of EPR hyperfine coupling for vanadocene(IV) complexes”, Chem. Phys., Vol. 305, (2004), pp. 291–298.

    Article  CAS  Google Scholar 

  22. J. Petersen and F. Dahl: “Synthesis and Structural Characterization by X-Ray Diffraction and Elactron Paramagnetic Resonance Single-Crystal Techniques of V(η 5-C5H4CH3)2Cl2 and Ti(η 5-C5H4CH3)2Cl2. A Study of the Spatial Distribution of the Unpaired Electron in a V(η 5-C5H5)2L2-Type Complex”, J. Am. Chem. Soc., Vol. 97, (1975), pp. 6422–6433.

    Article  CAS  Google Scholar 

  23. G.S. Herrmann, H.G. Alt and U. Thewalt: “Titanocene Trifluoroacetato Complexes: The Molecular Structure of [Cp2Ti(OCOCF3)]2μ−O and Cp2Ti(OCOCF3)2”, J. Organomet. Chem., Vol. 399, (1990), pp. 83–92.

    Article  CAS  Google Scholar 

  24. D.H. Gibson, Y. Ding, J.F. Richardson and M.S. Mashuta: “Bis(η 5-cyclopentadienyl)bis(formato-O)titanium”, Acta Crystallogr. Sect. C-Cryst. Struct. Commun., Vol. 52, (1996), pp. 1614–1616.

    Article  Google Scholar 

  25. D.M. Hoffman, N.D. Chester and R.C. Fay: “Bent Metallocenes Containing Potentially Bidentate Ligands. The Crystal and Molecular Structure of Bis(ν-cyclopentadienyl)bis(benzoato)titanium(IV)”, Organometallics, Vol. 2, (1983), pp. 48–52.

    Article  CAS  Google Scholar 

  26. Y.K. Zhou, Z.Q. Wang, X. Wang and Y. Zhu: “Synthesis, Characterization and Structure of Carboxylate Derivatives of Bis(methylcyclopentadienyl)titanium(IV)”, Polyhedron, Vol. 9, (1990), pp. 783–787.

    Article  CAS  Google Scholar 

  27. Z. Otwinowski and W. Minor: “Processing of X-ray diffraction data collected in oscillation mode”, In: Methods Enzymol. Part A: Macromolecular Crystallography, Vol. 276, Academic Press, San Diego, 1997, pp. 307–326.

    Chapter  Google Scholar 

  28. A. Altomare, G. Cascarano, C. Giacovazzo, A. Guagliardi, M.C. Burla, G. Polidori, and M. Camalli: “SIRPOW. 92-a program for automatic solution of crystal structures by direct methods optimized for powder data”, J. Appl. Cryst., Vol. 27, (1994), pp. 435–436.

    Article  Google Scholar 

  29. G.M. Sheldrick: SHELXL97 Program for Crystal Structure Refinement for Diffraction Data, University of Gőttingen, Germany, 1997.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

About this article

Cite this article

Vinklarek, J., Honzíĉek, J., Císařová, I. et al. Synthesis, characterization and structure of the Bis(methyl-cyclopentadienyl)vanadium(IV) carboxylates. cent.eur.j.chem. 3, 157–168 (2005). https://doi.org/10.2478/BF02476246

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.2478/BF02476246

Keywords

Navigation