Synthesis and Characterization of Complexes of Transition Metal Ions with New Pentaazamacrocyclic Ligands

• Autorzy: Nishat N. , Rahis-ud-din , Haq M. M.
• Języki publikacji: EN

Abstrakty

EN

New multidentate ligands 1,4,7,9,12-pentaaza-10,11-dioxo-8,9,12,13-bis-(1_,3_-dioxo- 6,6-diethyl-2_-hydropyrimidine)-trideca-7,13-diene, (L1) and 1,4,7,9,13-pentaaza-10,12- dioxo-8,9,13,14-bis-(1_,3_-dioxo-6,6-diethyl-2_-hydropyrimidine)-tetradeca-7,14-diene (L2) have been prepared by the reaction of 5,5-diethylbarbituric acid, diethylenetriamine, diethyl oxalate and 5,5-diethylbarbituric acid, diethylenetriamine, diethyl malonate. Their coordination properties with the first row of transition metal ions have been explored. The macrocyclic complexes were characterized by elemental analysis, IR, 1H NMR, UV-visible spectroscopy, magnetic moment measurements and molar conductance measurements. The electronic spectra and magnetic moment measurements are discussed with respect to assignment of square planar and tetrahedral structure except chromium(III), iron(III) ions. The chromium(III) and iron(III) complexes are considered to be octahedral. Molar conductance measurements suggest that the complexes of divalent metal ions are 1:1 electrolytes, while the trivalent metal ions are nonelectrolytes. The compounds have been tested against gram-positive bacteria Staphylococcus aureus and gram-negative bacteria Escherichia coli. The results show that all the compounds inhibit the growth of bacteria.

Słowa kluczowe

EN

multidentate ligands; Cr(III) complexes; Fe(III) complexes; antibacterial activity

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 12
• Strony: 1731--1740
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Nishat N.

• Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India

autor

Rahis-ud-din

• Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India

autor

Haq M. M.

• Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India

Bibliografia

• 1. Goeta A.E., Howard J.A.K Maffeo D., Puschmann H., Williams J.A.G. and Yufit D.S., J Chem. Soc Dalton Trans., 1880(2000).
• 2. Bim G., Leone S., Gray D.F., Milton T.W.H., Frank E.M., Boujemaa M and Keith S.M., J. Chem. Soc Dalton Trans., 1226 (2001).
• 3. Brooker S., de Geest D.J., Kelly R.J., Plieger P.G., Moubaraki B., Murray K.S. and Jameson G.B., J Chem. Soc. Dalton Trans., 2080 (2002).
• 4. Reddy M.R., Reddy K.H. and Raju K.M., Polyhedron, 17, 1355 (1988).
• 5. Busch D.H., Helv. Chim. Acta, (Fasciculus Extraordinarius Alfred Werner) 174 (1996).
• 6. Branco L., Costa J., Delgado R., Drew M.G.B., Felix V. and Goodfellow B.J., J. Chem. Soc. Dalton Trans., 3539 (2002).
• 7. Roy T.G., Hazari S.K.S., Dey B.K., Chakrabort S. and Tiekink E.R.T., J. Main Group Metal- Based Drugs, 6, 345 (1999).
• 8. Klinman J.P., Chem. Rev., 96,2541 (1996); Soloman E.I., Sundaram U.M. and Machonkin T.E., Chem Rev., 96, 2553 (1996).
• 9. Parker D., Chem. Soc. Rev., 19,271 (1990).
• 10. Gracia J., Molla M . and Borras J., Polyhedron, 4, 757 (1995).
• 11. Vogel A.I., A Text Book of Quantitative Inorganic Analysis, Longman: London, p. 460, 1968.
• 12. Reilley C.N., Schmid R.W. and Sadek F.S., J. Chem. Educ., 36, 555 (1959).
• 13. Verma R.S. and Imam S. A, Indian J. Micobiol., 13,45 (1979).
• 14. Geary W.J., Coord. Chem. Rev., 7, 81 (1971).
• 15. Bligh S.W.A, Choi N., Evagorous E.G., McPartlin M. and White K.N., J. Chem. Soc. Dalton Trans., 3169 (2001).
• 16. Kazunari S. and Hashimato M., Synth. React. Inorg. Met.-Org. Chem., 22(7), 875 (1992).
• 17. Ramadan A.E.M. and El-Mehasseb I.M., Trans. Met. Chem., 23, 183 (1998).
• 18. Sevagapandian S., Rajgopal G., Nehru K. and Athappan P., Trans. Met. Chem., 25, 388 (2000).
• 19. Ballhausen C.J., Introduction to Ligand Field Theory, McGraw Hill, NY, p. 251, 1962.
• 20. Hay R.W., Tarafder M.T.H. and Korybut-Daszkiewicz B., Trans. Met. Chem., 23, 165 (1998).
• 21. Sankaran S., Athappan P. and Rajgopal G., Trans. Met. Chem., 26, 588 (2001).