Abstract
New macrocyclic complexes have been prepared by reacting diethylenetriamine, benzil and a metal ion [cobalt(II), nickel(II) and copper(II)] in a 2:2:1 ratio in MeOH. The complexes were characterized by elemental analysis, spectroscopic data (u.v., i.r. and e.p.r.) magnetic susceptibility and conductivity measurements and are probably covalent. The metal ions are paramagnetic in a free spin state and appear to possess a slightly distorted octahedral geometry. A cyclic voltametric study on the copper complex indicates a reversible redox couple (CuII⇌CuI,E∘ = −0.48 V) in DMSO, which means that the macrocycle is capable of stabilizing the CuII⇌CuI process.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
P. V. Bernhardt and G. A. Lawrence, Coord. Chem. Rev., 104, 297 (1990).
D. Parker, Chem. Soc. Rev., 19, 271 (1990).
L. F. Lindoy, The Chemistry of Macrocyclic Ligand Complexes, Cambridge University Press, Cambridge, 1989.
R. M. Izatt, J. S. Bradshaw, S. A. Nielson, J. D. Lamb, J. J. Christensen and D. Sen, Chem. Rev., 85, 271 (1985).
R. M. Izatt, K. Pawlak, J. S. Bradshaw and R. L. Bruening, Chem. Rev., 91, 1721 (1991).
K. Henrick, P. A. Tasker and L. F. Lindoy, Prog. Inorg. Chem., 33, 1 (1985).
F. Lloret, J. Sletten, R. Ruiz, M. Julve, J. Faus, and Verdagner, Inorg. Chem., 31, 778 (1992).
T. Okawara, J. Chem. Soc. Chem. Commun., 1385 (1990).
B. S. Furnis, A. J. Hannaford, V. Rogers, P. W. G. Smith and A. R. Tatchell, Vogels Text Book of Practical Organic Chemistry, 4th Edit., ELBS, London, 1978.
W. J. Geary, Coord. Chem. Rev., 7, 81 (1971).
B. N. Figgis, Introduction to Ligand Fields, Wiley, New Delhi, 1966.
B. A. Goodman, Advances in Inorganic Chemistry and Radiochem-istry, Vol. 13, Academic Press, New York, 1970, p. 136.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Aqra, F.M.A.M. Transition metal ions as cores in the construction of an unprecedented large macrocycle. Transition Metal Chemistry 24, 71–73 (1999). https://doi.org/10.1023/A:1006944302804
Issue Date:
DOI: https://doi.org/10.1023/A:1006944302804