Transition Metal Chemistry

, Volume 7, Issue 4, pp 204–206 | Cite as

Reactions of coordinated ligands, Part III(1). Kinetics of lodination of malonate and pyruvate in malonato(pentaammine)-cobalt(III), malonato-bis-(ethylenediamine)cobalt(III) and pyruvato(pentaammine)cobalt(III) ions

  • Anadi C. Dash
  • Nivedita Mullick
  • Rabindra K. Nanda
Full Papers


The kinetics of iodination of malonate and pyruvate in the title complexes are reported at 35.0 °C and I=0.3 M. The reaction is first order in substrate and zeroth order in [I2]. This result is commensurate with rate determining enolisation of the active methylene and methyl groups of the malonate and pyruvate respectively. The reaction is catalysed by H2O, OH and by the buffer anions used. The rate data suggest that the malonate methylene group in the [Co(en)2-O2CCH2CO2]2+ chelate is considerably more active towards electrophilic substitution than is the case in [Co(NH3)5O2CCH2CO2]2+.


Methylene Physical Chemistry Cobalt Inorganic Chemistry Pyruvate 
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).
    Part. II, A. C. Dash, Mrs. N. Mullick and R. K. Nanda,Transition Met. Chem., 2, 222 (1977).Google Scholar
  2. (2).
    M. M. Jones,Ligand Reactivity and Catalysis, Academic Press, New York, 1968.Google Scholar
  3. (3).
    C. Bostic, Q. Fernando and H. Freiser,Inorg. Chem., 2, 232 (1963);4, 602 (1965).Google Scholar
  4. (4).
    K. K. Magurie and M. M. Jones,J. Am. Chem. Soc., 85, 154 (1963).Google Scholar
  5. (5).
    N. K. Chawla and M. M. Jones,Inorg. Chem., 3, 1549 (1964).Google Scholar
  6. (6).
    N. K. Chawla, D. G. Lambert and M. M. Jones,J. Am. Chem. Soc., 89, 557 (1969).Google Scholar
  7. (7).
    R. D. Gillard, R. P. Houghton and J. N. Tucker,Transition Met. Chem., 1, 67 (1976).Google Scholar
  8. (8).
    P. D. Bartlett,J. Am. Chem. Soc., 56, 967 (1934).Google Scholar
  9. (9).
    W. J. Albery, R. P. Bell and A. C. Powell,Trans. Faraday Soc., 61, 494 (1965).Google Scholar
  10. (10).
    J. E. Meany,J. Phys. Chem., 75, 150 (1971).Google Scholar
  11. (11).
    M. Marakami and K. Takahashi,Bull. Chem. Soc. Jpn., 32, 308 (1959).Google Scholar
  12. (12).
    R. D. Butler and H. Taube,J. Am. Chem. Soc., 87, 5577 (1965).Google Scholar
  13. (13).
    R. C. Splinter, S. T. Harris and R. S. Tobias,Inorg. Chem., 7, 898 (1968).Google Scholar
  14. (14).
    N. K. Mohanty, A. N. Mishra and R. K. Nanda,Ind. J. Chem., 16, 871 (1978).Google Scholar
  15. (15).
    R. D. Gillard and K. Garbett,J. Chem. Soc. A, 983 (1968).Google Scholar
  16. (16).
    A. C. Dash and R. K. Nanda,J. Inorg. Nucl. Chem., 37, 2139 (1975).Google Scholar

Copyright information

© Verlag Chemie GmbH 1982

Authors and Affiliations

  • Anadi C. Dash
    • 1
  • Nivedita Mullick
    • 1
  • Rabindra K. Nanda
    • 1
  1. 1.Department of ChemistryUtkal UniversityBhubaneswarIndia

Personalised recommendations