Abstract
A binuclear complex [Cu2(DTB)(DMF)4(H2O)]·2DMF (DTB = 1,4-dinitro-2,3,5,6-tetracarboxylatobenzenic anion; DMF = N,N-dimethylformamide) has been synthesized and its crystal structure determined by X-ray crystallography. In the complex Cu ion is located in a distorted square pyramidal environment with two oxygen atoms O(1) and O(3) from two carboxylate groups, another two oxygen atoms O(7) and O(8) from terminal ligands of two DMF molecules, and a fifth coordinated oxygen atom O(9) from the terminal ligand of one H2O molecule, in which the O(8) atom is situated in the apex of the pyramid. DTB as bridging ligand coordinates two Cu ions through its four carboxylate groups. The variable-temperature magnetic susceptibility of the complex was measured in the 5–300 K range. The magnetic coupling parameter is consistent with a ferromagnetic exchange between the two copper(II) centers and the data fit a binuclear magnetic exchange model based on the Hamiltonian operator (Ĥ = -2JŜ1Ŝ2, Ŝ1 = Ŝ2= 1/2), giving the ferromagnetic coupling parameter of 2J = 1.80 cm- 1. This is the first example of a tetracarboxylatobenzenic bridging complex exhibiting ferromagnetic interaction.
Similar content being viewed by others
References
L.P. Wu, M. Yamamoto, T. Kuroda-Sowa, M. Maekawa, J. Fukui and M. Munakata, Inorg. Chim. Acta, 239, 165 (1995).
L.P. Wu, M. Munakata, T. Kuroda-Sowa, M. Maekawa and Y. Suenaga, Inorg. Chim. Acta, 249, 183 (1996).
H. Tamura, K. Ogawa and W. Mori, J. Crystallogr. Spectrosc. Res., 19, 203 (1989).
M.-G. Zhao, C.-Q. Liu, J.-M. Shi and W. Xu, Transition. Met. Chem., 28, 525 (2003).
M.-G. Zhao, J.-M. Shi, C.-Q. Liu, W. Xu and Y.-Q. Chen, Polish J. Chem., 77, 829 (2003).
F.D. Rochon and G. Massarweh, Inorg. Chim. Acta, 314, 163 (2001).
W.-R. Zhang, S. Bruda, C.P. Landee, J.L. Parent and M.M. Turnbull, Inorg. Chim. Acta, 342, 193 (2003).
K. Barthelet, D. Riou, M. Nogues and G. Ferey, Inorg. Chem., 42, 1739 (2003).
M. Sanselme, J.M. Greneche, M. Riou-Cavellec and G. Ferey, Chem. Commun., 2172 (2002).
D.K. Towle, S.K. Hoffmann, W.E. Hatfield, P. Singh, P. Chaudhuri and K. Wieghardt, Inorg. Chem., 24, 4393 (1985).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shi, Jm., Zhang, X. & Yin, Hl. Synthesis, crystal structure and ferro-magnetic interaction of a binuclear copper(II) complex with the 1,4-dinitro-2,3,5,6-tetracarboxylatobenzenic anion as bridging ligand. Transition Metal Chemistry 29, 671–674 (2004). https://doi.org/10.1007/s11243-004-5362-3
Issue Date:
DOI: https://doi.org/10.1007/s11243-004-5362-3