Transition Metal Chemistry

, Volume 1, Issue 1, pp 10–13 | Cite as

Synthesis of organo-platinum(II) and -palladium(II) complexes ofN-phenyl- andN-(p-Tolyl)pyrazole

  • Matsuo Nonoyama
  • Hiromichi Takayanagi


When platinum(II) chloride dissolved in acetic acid containing concentrated hydrochloric acid was refluxed withN-phenylpyrazole(liphpz) andN-(p-tolyl)pyrazole (Htlpz), complexes of composition [Pt(N-C)Cl]2 (N-C = phpz, tlpz) were obtained, in which phpz and tlpz are coordinated through nitrogen and carbon forming a five membered metallocycle. Similar palladium(II) complexes [Pd(N-C)Cl]2 were easily prepared by the reaction of palladium(II) chloride with Hphpz and Htlpz in methanol in the presence of lithium chloride. These [M(N-C)CI]2 complexes reacted with tri-n-butylphosphine (PBu3) and pyridine (py) to give the adducts [M(N-C)ClL](L = PBu3, py). Ethylenediamine(en) and acetylacetone(Hacac) gave IPd(phpz)(en)]Cl and [Pd(phpz)(acac)] respectively. These new complexes are characterized by means of1H-n.m.r. and i.r. spectra, and probable structures are proposed.


Chloride Lithium Acetic Acid Platinum Catalysis 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    S. Trofimenko,Inorg. Chem., 12, 1215 (1973).Google Scholar
  2. 2.
    M. Nonoyama,J. Organometal. Chem., 86, 263 (1975).Google Scholar
  3. 3.
    J. R. Ferraro,Low Frequency Vibrations of Inorganic and Coordination Compounds, Plenum Press, New York 1971,p. 111.Google Scholar
  4. 4.
    L. J. Bellamy,The Infrared Spectra of Complex Molecules, 2nd Edit., Methuen, London 1966, p. 75.Google Scholar
  5. 5.
    T. G. Appleton, H. C. Clark, and L. E. Manzer,Coord. Cheat. Rev., 10, 335 (1973).Google Scholar
  6. 6.
    Y. Nakamura and K. Nakamoto,Inorg. Chem., 14, 63 (1975).Google Scholar
  7. 7.
    K. Nakamoto,Infrared Spectra of Inorganic and Coordination Compounds, 2nd Edit., Wiley-Interscience, New York 1973,p. 247.Google Scholar
  8. 8.
    R. W. Berg and K. Rasmussen,Spectrocbim. Acta, 28A, 2319 (1972).Google Scholar
  9. 9.
    W. J. Geary,Coord. Chem. Rev., 7, 81 (1971).Google Scholar
  10. 10.
    I. L. Finar and K. E. Godfrey,J. Chem. Soc., 1954, 2293.Google Scholar
  11. 11.
    M. Nonoyama,J. Organometal. Chem., 74, 115 (1974):82, 271 (1974).Google Scholar

Copyright information

© Verlag Chemie 1975

Authors and Affiliations

  • Matsuo Nonoyama
    • 1
  • Hiromichi Takayanagi
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceNagoya UniversityChikusa, NagoyaJapan

Personalised recommendations