Powiadomienia systemowe
- Sesja wygasła!
- Sesja wygasła!
- Sesja wygasła!
- Sesja wygasła!
- Sesja wygasła!
- Sesja wygasła!
Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
Two new mi-oxamido-bridged copper(II)-chromium(III) heterotetranuclear complexes formulated as [Cu3 (dmoxae)3Cr](ClO4 )3 (1) and [Cu3(dmoxpn)3Cr](ClO4)3 (2), where dmoxae and dmoxpn represent N,N'-bis[2-(dimethylamino)ethyl]oxamido and N,N'-bis[3-(dimethylamino)propyl]oxamido dianions, respectively, have been synthesized and characterized by the elemental analyses, spectroscopic (IR, UV, ESR) studies, magnetic moments (at room-temperature) and by molar conductivity measurements. It is proposed that these complexes have oxamido-bridged structures consisting of three copper( II) ions and a chromium(III) ion, in which the chromium(III) ion has an octahedral environment and the three copper(II) ions have a square-planar environment. The two heterotetranuclear complexes were further characterized by variable-temperature magnetization (3~300 K) measurements and the magnetic data have been used to deduce the indicated heterotetranuclear structure. The results derived from least-squares fit of the experimental data have confirmed that the operation of a ferromagnetic interaction between the adjacent copper(II) and chromium(III) ions occurs through the oxamidobridge within each molecule. On the basis of the spin Hamiltonian operator, H= - 2J(S cu . S cr + S cu2 . S cr + S cu2 . S cr ), the magnetic analyses were carried out for the two copper(II)-chromium(III) heterotetranuclear complexes and the spin-coupling constants (J)were evaluated as +9.28 cm-1 for (1) and+9.63 cm-1 for (2). The influence of the symmetry of the magnetic orbitals on the nature of the magnetic interaction between the paramagnetic centers is preliminary discussed.
Wydawca
Czasopismo
Rocznik
Tom
Strony
1327--1336
Opis fizyczny
Bibliogr. 28 poz., rys.
Bibliografia
- 1.Kahn O., Molecular Magnetism, N. Y., Verlag-Chemie, 1993.
- 2.Kahn O., Adv. Inorg. Chem., 43, 179 (1996).
- 3.Benelli C. and Gatteschi D., Chem. Rev., 102, 2369 (2002).
- 4.Winpenny R.E.P., Chem. Soc. Rev.t 27,447 (1998).
- 5.Kahn M.L., Mathoniere C. and Kahn O., Inorg. Chem., 30, 3692 (1999).
- 6.Kahn O., Struct. Bond. (Berlin), 68, 89 (1987).
- 7.Yu P., Kahn O., Nakatani K., Codjovi E., Mathoniere C. and Sletten J., J. Am. Chem. Soc., 113, 6558 (1991).
- 8.Journaux Y, Kahn O., Zarembowitch J., Galy J. and Jaud J., J. Am. Chem. Soc., 105, 7585 (1983).
- 9.Zhuong J.Z., Matsumoto N., Okawa H. and Kida S., Inorg. Chem., 30, 436 (1991).
- 10.Zhuong J.Z., Okawa H., Matsumoto N., Sakiyama H. and Kida S., J. Chem. Soc., Dalton Trans., 479 (1991).
- 11.Lloret R, Journaux Y. and Julve M., Inorg. Chem., 29, 3967 (1990).
- 12.Ojima H. and Nonoyama K., Coord. Chem. Rev., 92, 85 (1988).
- 13.Ruiz R., Faus J., Lloret F., Julve M. and Journaux Y., Coord. Chem. Rev., 193-195, 1069 (1999).
- 14.Cronin L., Mount A.R., Parsons S. and Robertson N., J. Chem. Soc., Dalton Trans., 1925 (1999).
- 15.Li Y.T., Yan C.W. and Zhang J., Cryst. Growth & Design, 76, 1655 (2002).
- 16.Bethrent J.R. and Madan S.K., J. Inorg. Nucl. Chem., 20, 195 (1950).
- 17.Ojima H. and Yamada Y., Bull. Chem. Soc. Jpn., 43, 3018 (1970).
- 18.Selwood P.W., Magnetochemistry, Intersciences, N. Y, 1956, p. 78.
- 19.Geary W.J., Coord. Chem. Rev., l, 81 (1971).
- 20.Nakamoto K., InfraredandRaman Spectra of Inorganic and Coordination Compounds, 4th Edit., Wiley, New York, 1986.
- 21.Lever A.B.R, Inorganic Electronic Spectroscopy, Ch. 9, Elsevier Publishing Co., Amsterdam, 1968.
- 22.Kambe K., J.. Phys. Soc. Jpn., 5, 48 (1950).
- 23.Suzuki M., Oshio H., Uenara A., Endo K., Yanaga M., Kida S. and Saito K., Bull. Chem. Soc. Jpn., 61, 3907(1988).
- 24.Hay R J., Thibeault J.C. and Hoffman R., J. Am. Chem. Soc., 97, 4884 (1975).
- 25.Yu R, Journaux Y. and Kahn O., Inorg. Chem., 28, 100 (1989).
- 26.Kahn O. and Charlot M.F., Nouv. J. Chem., 4, 567 (1980).
- 27.Dance I.G., Inorg. Chim. Acta, 9, 77 (1974).
- 28.Morgenstern-Badarau I., Rerat M., Kahn O., Jaud J. and Galy J., Inorg. Chem., 21, 3050 (1982).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ6-0007-0025