Antiferromagnetically Coupled Chromium(III)-Chromium(III) Binuclear Complexes with Tris(oxalato)chromate(III)

Li, Y.; Lou, J.; Yan, C.

Artykuł - szczegóły

Tytuł artykułu

Antiferromagnetically Coupled Chromium(III)-Chromium(III) Binuclear Complexes with Tris(oxalato)chromate(III)

Autorzy

Li Y. , Lou J. , Yan C.

Identyfikatory

Warianty tytułu

Języki publikacji

Abstrakty

Three new binuclear chromium(III) complexes bridged by tris(oxalato)chromate(III), [Cr(ox)3]3- and end-capped with 2,2_-bipyridine (bpy); 4,4_-dimethyl-2,2_-bipyridine (Me2bpy) or 5-methyl-1,10-phenanthroline (Mephen), have been synthesized and characterized, namely [Cr2(ox)3(bpy)2] (1), [Cr2(ox)3(Me2bpy)2] (2) and [Cr2(ox)3(Mephen)2] (3). At present, the three complexes have not yet been isolated in crystalline form, suitable for X-ray structure analysis, but based on elemental analyses, molar conductance and magnetic moments of room-temperature measurements, and spectroscopic studies, extended ox-bridged structures consisting of two chromium(III) ions, each in an octahedral environment are proposed for these complexes. The complexes [Cr2(ox)3(bpy)2] (1) and [Cr2(ox)3(Me2bpy)2] (2) were further characterized by variable temperature magnetic susceptibility (4.2~300 K) measurements and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, H_ = 2JS_ ĹS_ 1 2, giving the exchange integrals J = -9.73 cm-1 for (1) and J = -5.29 cm-1 for (2). This result indicates the presence of weak antiferromagnetic spin-exchange interaction between the metal ions within each molecule. The influence of the methyl substituents in the terminal ligand on magnetic interactions between the metals is also discussed.

Słowa kluczowe

mi-oxalato-bridge binuclear chromium(III) complexes antiferromagnetic interaction synthesis

Wydawca

Polskie Towarzystwo Chemiczne

Czasopismo

Polish Journal of Chemistry

Rocznik

2004

Tom

Vol. 78 / nr 6

Strony

761--769

Opis fizyczny

Bibliogr. 30 poz., rys.

Twórcy

autor

Li Y.

Marine Drug & Food Institute, Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, P. R. China

autor

Lou J.

Marine Drug & Food Institute, Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, P. R. China

autor

Yan C.

College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, P. R. China

Bibliografia

1. Gatteschi D., Kahn O., Miller J.S. and Palacio F. (Eds.), “Molecular Magnetic Materials", NATO AST Series, Kluwer, Dordrecht, (1991).
2. Evans W.J., Clark R.D., Ansari M.A. and Ziller J.W., J. Am. Chem. Soc., 120, 9555 (1998).
3. Guerriero P., Vigato P.A., Bunzli J.-C.G. and Moret E„ J. Chem. Soc., Dalton Trans., 647 (1990).
4. Gunko Y.K., Hitchcock P.B. and Lappert M.F., J. Chem. Soc., Chem. Commun., 1843 (1998).
5. Piguet C., Rivara-Minten E., Bemardinelli G., Bunzli J.C.G. and Hopfgartner G., J. Chem. Soc., Dalton Trans., 421 (1997).
6. Costes J.P., Dahan F., Dupuis A., Lagrave S. and Laurent J.P., Inorg. Chem., 37, 153 (1998).
7. Saalfrank R.W., Trummer S., Reimann U., Chowdhry M.M., Hampel F. and Waldmann O., Angew. Chem., Int. Ed., 39, 3492 (2000).
8. Solomon F.I., Brunold T.C., Davis M.Z., Kemsley J.N., Lee S.-K., Skulan A.J., Yang Y.S. and Zhou J., Chem. Rev., 100, 235 (2000).
9. Benelli C. and Gatteschi D., Chem. Rev., 102, 2369 (2002).
10. Daiguebonne C., Guillou D., Kahn M.L., Kahn O., Oushoom R.L. and Boubekeur K, Inorg. Chem., 40, 176 (2001).
11. Cortes R., Urtiaga M.K., Lezama L., Arriortua M.l. and Rojo T., Inorg. Chem., 33, 829 (1994).
12. Yu P., Joumaux Y. and Kahn O., Inorg. Chem., 28, 100 (1989).
13. Curtis N.F.,7. Chem. Soc., 1584(1968).
14. Coronado E., Gomez-Garcia C.J., Nuez A., Romero F.M., Rusanov E. and Stoeckli-Evans H., Inorg. Chem., 41, 4615 (2002).
15. Coronado E., Galan-Malcaros J.R., Gimenez-Saiz C., Gomez-Garcia C.J. and Ruiz-Perez C., Eur. J. Inorg. Chem., 2290 (2003).
16. Brauer G. (Ed.), Handbook of Preparative Inorganic Chemistry, Academic Press, N.Y., 1372 (1965).
17. Baylar J.C. and Jones E.M., Inorg. Synth. (Ed.: H.S. Both), McGraw-Hill, NY, USA, 1939, Vol. 1, p. 35.
18. Selwood P.W., “Magnetochemistry”, Interscience, N.Y., pp. 78-91 (1956).
19. Sinn E., in “Biological and Inorganic Copper(II) Chemistry”, K.D. Karlin and J. Zubieta (Eds.), Adenine Press, Guilderland, N.Y. (1986).
20. Li Y.T., Yan C.W., Miao S.H. and Liao D.Z., Polyhedron, 15, 2491 (1998).
21. Geary W.J., Coord. Chem. Rev., 7, 81 (1971).
22. Nakamoto K., “Infrared and Raman Spectra ofInorganic and Coordination Compounds", Wiley, N.Y. (1986).
23. Kahn O., Angew. Chem., Int. Edit. Engl, 24, 384 (1985).
24. Lever A.B.P., “Inorganic Electronic Spectroscopy", Elsevier Science Publishers B. V., Amsterdam, Oxford, N.Y., Tokyo (1984).
25. Jorgensen C.K., Progr. Chem., 4, 101 (1962).
26. Singh B. and Sahaip P., Synth. React. Inorg. Mel.-Org. Chem., 28, 61 (1998).
27. Lambert S.L., Spiro C.L., Gagne R.R. and Hendrickson D.N., Inorg. Chem., 21, 68 (1982).
28. Brewer G.A. and Sinn E., Inorg. Chem., 26, 1529 (1987).
29. Julve M., Verdaguer M., Gleizes A., Philoche-Levisalles M. and Kahn O., Inorg. Chem., 23, 3808 (1984).
30. Bencini A., Bianchi A., Poli P., Garcia-Espana E., Julve M. and Marcelino V., J. Chem. Soc., Dalton Trans., 7, 2213 (1990).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-article-BUJ1-0024-0024