Abstract
Two new copper(II) complexes, [Cu2(L1)4(H2O)2](SO4)4· 2H2O and [Cu(L2)2(H2O)2]SO4, were isolated containing 2-furoic hydrazide and 5-nitro-2-furoic hydrazide ligands, respectively. The complexes were characterized by thermal, magnetic and spectroscopic techniques, showing a distorted tetragonal environment around the metal ion. Compound (1), containing 2-furoic hydrazide as the ligand, appears to be dimeric in the solid state, with substituted hydrazine acting as a bidentate bridging ligand. On the contrary, a monomeric species was observed with the 5-nitro-2-furoic hydrazide ligand, probably in the cis configuration, for compound (2). Magnetic measurements for the binuclear copper(II) complex (1) were carried out at low temperatures, in the 2–300 K range, and a magnetic field of 500 G, indicating that besides an intramolecular ferromagnetic interaction between the two Cu(II) centers, for which J/k = 1.07 K, further weak antiferromagnetic interactions between adjacent dimers, with J′z/k =−0.95 K, should be taken into account. However, in MeOH/H2O solution, evidence of equilibria involving the dimer (1) and the corresponding mononuclear cis and trans species was obtained from e.p.r. spectra.
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J.R. Pires, C. Saito, S.L. Gomes, A.M. Giesbrecht and A.T. do Amaral, J. Med. Chem., 44, 3673 (2001).
M.V. de Almeida, M. Le Hyaric, L.J.A. Siqueira, L.D. Pinto, M.S. Valle and W.A. Alves, Molecules, 6, 728 (2001).
M.A. Naylor, M.A. Stephens, S. Cole, M.D. Threadgill, I.J. Stratford, P. O'Neill, E.M. Fielden and G.E. Adams, J. Med. Chem., 33, 2508 (1990).
N. Dodoff, K. Granharov and N. Spassovska, J. Inorg. Biochem., 60, 257 (1995).
Z. Muhi-Eldeen, K. Al-Obaidi, M. Nadir and V.F. Roche, Eur. J. Med. Chem., 27, 101 (1992).
K.K. Narang and V.P. Singh, Synth. React. Inorg. Met. Org. Chem., 23, 971 (1993).
P. Sur, S.P. Chatterjee, P. Roy and B. Sur, Cancer Lett., 94, 27 (1995).
(a) G.E. Jackson, L.M. Gama, A. Vogé and M. Kelly, J. Inorg. Biochem., 79, 147 (2000); (b) J.R.J. Sorenson, in J.O. Nriagu (Ed.) Copper in the Environment, Part 2, Health Effects, Wiley, New York, 1979, p. 83.
(a) I.L. Bonta, M. Parnham, J.E. Vincent and P.C. Bragt, Progr. Med. Chem., 17, 185 (1980); (b) B.S. Nakani and G.E. Jackson, J. Chem. Soc., Dalton Trans., 1373 (1996); (c) G.E. Jackson, P.W. Linder and A. Voye, J. Chem. Soc., Dalton Trans., 4605 (1996).
(a) A. Ferrari, A. Braibanti, G. Bigliardi, A.M.M. Lanfredi and A. Tiripicchio, Nature, 211, 1174 (1966); (b) D. Nicholls and R. Swindells, J. Chem. Soc., 4204 (1964).
(a) O.F. Clemes, W.S. Bray and H.H. Sisler, Inorg. Chem., 2, 1251 (1953); (b) C. Furlani, G. Mattagno, A. Monaci and F. Tarli, Inorg. Chim. Acta, 4, 187 (1970).
(a) L.K. Thompson, Coord. Chem. Rev., 233–234, 193 (2002); (b) V.A. Milway, L. Zhao, T.S.M. Abedin, L.K. Thompson and Z. Xu, Polyhedron, 22, 1271 (2003).
R.L. Carlin, Magnetochemistry, Springer, Berlin, 1986.
B. Cardillo, E. Giorgini, E. Maurelli and G. Tosi, Montash. Chem., 123, 231 (1992).
(a) A.W. Herlinger, S.L. Wenhold and T.V. Long, J. Am. Chem. Soc., 4, 6474 (1970); (b) K. Nakamoto, Infrared, Raman Spectra of Inorganic and Coordination Compounds, 5th edit., Wiley, New York, 1997.
R.J. Baker, S.C. Nyburg and J.T. Szymanski, Inorg. Chem., 10, 138 (1971).
J.F. Alcock, R.J. Baker and A.A. Diamantis, Aust. J. Chem., 25, 289 (1972).
(a) T.D. Smith and J.R. Pilbrow, Coord. Chem. Rev., 13, 173 (1974); (b) F. Sapiña, M. Burgos, E. Escrivã and J.-V. Folgado, Inorg. Chim. Acta, 216, 185 (1994).
(a) W.A. Alves, S.A. de Almeida-Filho, R.H. de Almeida Santos and A.M.D.C. Ferreira, Inorg. Chem. Comm., 6, 294 (2003); (b) W.A. Alves, I.A. Bagatin and A.M.D.C. Ferreira, Inorg. Chim. Acta, 321, 11 (2001); (c) W.A. Alves, S.A. de Almeida-Filho, M.V. de Almeida, A. Paduan-Filho, C.C. Becerra and A.M.D.C. Ferreira, J. Mol. Catal. A: Chem., 198, 63 (2003).
(a) R.C. Aggarwal, N.K. Singh and R.P. Singh, Inorg. Chem., 20, 2794 (1981); (b) C.R. Lucas, S. Liu and L. Thompson, Inorg. Chem., 29, 85 (1990).
U. Sakaguchi and A.W. Addison, J. Chem. Soc., Dalton Trans., 600 (1979).
O. Kahn, Molecular Magnetism, Wiley-VCH, New York, 1993.
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Soares Fontes, A.P., Guerra, W., Cavalieri Machado, F. et al. New Copper(II) Complexes Containing 2-Furoic Hydrazide and 5-Nitro-2-Furoic Hydrazide Ligands: Synthesis, Thermal, Magnetic and Spectroscopic Characterization. Transition Metal Chemistry 29, 382–387 (2004). https://doi.org/10.1023/B:TMCH.0000027451.42739.b5
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DOI: https://doi.org/10.1023/B:TMCH.0000027451.42739.b5