Abstract
Complexes of manganese(II) and gadolinium(III) hexafluoroacetylacetonates with stable nitroxide 4-phenyl-2,2,5,5-tetramethyl-3-imidazoline-3-oxide-1-oxyl (L), Mn(hfac)2L2 and Gd(hfac)3L2, have been synthesized. The results of an X-ray study of these complexes (Mn(hfac)2L2: a=21.762(4), b=9.685(1), c=22.073(3) Å, β=114.94(1)°, space group Cc, Z=4; Gd(hfac)3L2: a=22.079(4), b=11.562(2), c=21.302(4) Å, β=112.25(1)°, space group Cc, Z=4) have shown that both compounds have a molecular structure with the paramagnetic ligand coordinated via the oxygen atom of the N-oxide group. According to the results of static magnetic susceptibility measurements, the energies of exchange interactions between unpaired electrons of L and of metal ions are less than 1 cm−1 in magnitude.
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References
A. Caneschi, D. Gatteschi, and P. Rey,Prog. Inorg. Chem.,89, 331–350 (1991).
V. I. Ovcharenko,Synthetic Chemistry of Stable Imidazoline Nitroxides, CRC Press, Boca Raton, FL (1994), pp. 159–219.
A. Caneschi, D. Gatteschi, P. Rey, and R. Sessoli,Inorg. Chem.,27, 1756–1761 (1988).
A. Caneschi, D. Gatteschi, L. Pardi, P. Rey, et al.,ibid. Inorg. Chem., 2027–2032.
A. Caneschi, D. Gatteschi, J. Laugier, and P. Rey,J. Am. Chem. Soc.,110, 2795–2799 (1988).
C. Benelli, A. Ganeschi, D. Gatteschi, et al.,Angew. Chem., 958–959 (1987).
F. A. Cotton and R. H. Holm,J. Am. Chem. Soc.,82, 2979–2983 (1960).
M. F. Richardson, W. F. Wagner, and D. E. Sands,J. Inorg. Nucl. Chem.,30, 1275–1290 (1968).
G. M. Sheldrick,SHELX-86, in:Crystallographic Computing 3, G. M. Sheldrick, C. Kruger, and R. Goddard (eds.), Oxford University Press, London (1987), pp. 175–189.
G. M. Sheldrick,SHELX-76. A Program for Crystal Structure Determination, Cambridge (1976).
L. B. Volodarskii, I. A. Grigoriev, S. A. Dikanov, et al., in:Imidazoline Nitroxides [in Russian] Nauka, Novosibirsk (1988), p. 90.
L. M. Shkolnikova and M. A. Porai-Koshits,Itogi Nauki Tekh., Ser. Kristallokhim., Vol. 16, 117–125 (1982).
R. S. Drago, T. C. Kuechler, and M. Kroeger,Inorg. Chem.,18, 2333–2337 (1979).
R. S. Drago, G. C. Vogel, and T. Needham,J. Am. Chem. Soc.,93, 6014–6026 (1971).
R. G. Pearson, —ibid.,85, 3533–3539 (1963).
S. J. Gruber, C. M. Harris, and E. Sinn,J. Chem. Phys.,49, 2183–2194 (1968).
A. P. Ginsberg and M. E. Lines,Inorg. Chem.,11, 2289–2290 (1972).
A. Caneschi, D. Gatteschi, and P. Rey,Prog. Inorg. Chem.,89, 331–370 (1991).
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International Tomography Center, Siberian Branch, Russian Academy of Sciences. Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 36, No. 3, pp. 518–527, May–June, 1995.
Translated by L. Smolina
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Burdukov, A.B., Pervukhina, N.V., Ikorskii, V.N. et al. Synthesis, structure, and magnetic properties of mixed-ligand complexes of manganese and gadolinium hexafluoroacetylacetonates with 4-phenyl-2,2,5,5-tetramethyl-3-imidazoline-3-oxide-1-oxyl nitroxide. J Struct Chem 36, 474–483 (1995). https://doi.org/10.1007/BF02578535
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DOI: https://doi.org/10.1007/BF02578535