Transition Metal Chemistry

, Volume 10, Issue 2, pp 45–47 | Cite as

Ligand effects on metal-oxygen stretching frequencies in dioxomolybdenum(VI) complexes

  • Arun Syamal
  • Manar Ram Maurya
Full Papers


Several new seven-coordinated dioxomolybdenum(VI) heterochelates, [MoO2(AA)(BBB)], where AA = bidentate ligand = ethylenediamine, 2-aminoethylpyridine,o-pheny-lenediamine,o-phenanthroline or 2,2′-dipyridyl; BBB = tridentate ligand (the Schiff base derived from benzoylhydrazide and salicylaldehyde), have been synthesized and characterized by elemental analysis, molar conductance, molecular weight, i.r. spectra and magnetic susceptibility measurements. The principle of coordination number expansion of a six coordinate homochelate, [MoO2(H2O)(BBB)] was used to prepare the complexes, which are nonelectrolytes, monomers and diamagnetic. The i.r. spectral data reveal that they possess acis-MoO2 structure. The νsym(OMoO) and νasym(OMoO) shifts and the difference between νsym(OMoO) and νasym(OMoO) have been related to an increase in electron density at the molybdenum atom therein.


Molybdenum Magnetic Susceptibility Schiff Base Coordination Number Schiff 
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).
    E. I. Stiefel,Prog. Inorg. Chem., 22, 1 (1977).Google Scholar
  2. (2).
    R. H. Holm, G. W. Everett, Jr. and A. Chakravarty,Prog. Inorg. Chem., 7, 83 (1966).Google Scholar
  3. (3).
    A. E. Comyns,Chem. Rev., 60, 124 (1960); S. Yamada,Coord. Chem. Rev., 1, 415 (1966); N. F. Curtis,Coord. Chem. Rev., 3, 3 (1968); A. Syamal,Inorg. Nucl. Chem. Lett., 4, 625 (1968); A. Syamal and V. A. Ghanekar,J. Coord. Chem., 5, 39 (1975),Transition Met. Chem., 2, 117 (1977); A Syamal and P. K. Mandal,Transition Met. Chem., 3, 292 (1978),4, 348 (1979).Google Scholar
  4. (4).
    L. Gatterman and H. Wieland,Laboratory Methods of Organic Chemistry, MacMillan, London, 1963, p. 153.Google Scholar
  5. (5).
    A. Syamal and K. S. Kale,Indian J. Chem., 16 A, 46 (1978).Google Scholar
  6. (6).
    A. Syamal and D. Kumar,Indian J. Chem., 21 A, 534 (1982).Google Scholar
  7. (7).
    F. G. Mann and B. C. Saunders,Practical Organic Chemistry, Longmans, London, 1961, p. 435.Google Scholar
  8. (8).
    A. Syamal,Coord. Chem. Rev., 16, 309 (1975).Google Scholar
  9. (9).
    H. H. Freedman,J. Am. Chem. Soc., 83, 2900 (1961).Google Scholar
  10. (10).
    T. Tokii, Y. Muto, M. Kato, K. Imai and H. B. Jonasen,J. Inorg. Nucl. Chem., 34, 3377 (1972).Google Scholar
  11. (11).
    A. A. Schilt and R. C. Taylor,J. Inorg. Nucl. Chem., 9, 211 (1959).Google Scholar
  12. (12).
    M. L. Larsen and F. W. Moore,Inorg. Chem., 5, 80 (1968).Google Scholar

Copyright information

© VCH Verlagsgesellschaft mbH 1985

Authors and Affiliations

  • Arun Syamal
    • 1
  • Manar Ram Maurya
    • 2
  1. 1.Department of Applied Sciences and HumanitiesKurukshetra UniversityKurukshetra 132119 HaryanaIndia
  2. 2.Department of ChemistryRegional Engineering CollegeKurukshetra 132119 HarayanaIndia

Personalised recommendations