Abstract
The crystals of [Cu2(Edta)(Py)2(H2O)2] · 2H2O (I) and [Cu(Im)6]{;Cu(Im)4[Cu(Edta)(Im)]2} · 6H2O (II) were isolated as a result of the reaction of an aqueous solutions of Cu2(Edta) · 4H2O with pyridine or imidazole, respectively. The crystals were studied by X-ray diffraction. The crystals of I are monoclinic, a = 12.682 Å, b = 6.788 Å, c = 14.834 Å, β = 91.44°, Z = 2, space group P21/n. The crystals of II are triclinic, a = 9.118 Å, b = 14.889 Å, c = 15.130 Å, α = 72.59°, β = 72.94°, γ = 82.54°, Z = 1, space group P{ie241-1}. In the centrosymmetric binuclear complex molecule of I, an N atom and two O atoms of the Edta ligand are coordinated to each Cu atom (Cu-N, 2.046 Å; Cu-O, 1.941 and 1.954 Å). The N atom of the pyridine molecule (Cu-N, 1.993 Å) completes the base of an elongated tetragonal pyramid (4 + 1) with the O atom of the H2O molecule in the apex (Cu-O(w), 2.244 Å). The crystals of II are built of centrosymmetric complex cations [Cu(Im)6]2+ (Cu(1)-N, 2.469, 2.021, and 2.056 Å), centrosymmetric trinuclear complex anions {;Cu(Im)4[Cu(Edta)(Im)]2}2−, and crystal water molecules. In the anion, the central fragment [Cu(Im)4]2+ (Cu(2)-N, 1.985 and 2.023 Å) is bonded to two peripheral complexes [Cu(Edta)(Im)]2− through atoms O of the Edta ligand (Cu(2)-O, 2.615 Å). In the [Cu(Edta)(Im)]2− fragment of the complex anion, the Cu(3) atom is bonded to the Edta ligand through the two N atoms and three O atoms (Cu(3)-N, 1.970 and 2.071 Å; Cu(3)-O, 1.966, 1.969, and 2.238 Å) and with the imidazole molecule, through an N atom (Cu(3)-N, 2.397 Å). The coordination polyhedra of the three copper atoms (Cu(1)-Cu(3)) in the structure of II are elongated tetragonal bipyramids (4 + 2). In the structures studied, Edta4− is a hexadentate chelating/bridging ligand. However, the coordination mode of the ligand in these structures is different: in the binuclear complex I, the Edta ligand is coordinated to each Cu atom through an N atom and two O atoms with the formation of two chelate rings (symmetric (trans) coordination mode), whereas, in the trinuclear complex II, the Edta ligand is coordinated to the Cu(2) atom through an O atom and to the Cu(3) atom through the two N atoms and three O atoms with the formation of three chelate rings (asymmetric (cis) coordination mode).
Similar content being viewed by others
References
M. A. Porai-Koshits and V. N. Serezhkin, Zh. Neorg. Khim. 39(12), 1967 (1994).
V. N. Serezhkin, T. N. Polynova, and M. A. Porai-Koshits, Koord. Khim. 21(4), 253 (1995).
T. V. Filippova, T. N. Polynova, M. A. Porai-Koshits, et al., Zh. Strukt. Khim. 14(2), 280 (1973).
T. N. Polynova, N. V. Dvortsova, T. V. Filippova, et al., Koord. Khim. 12(11), 1484 (1986).
A. Ya. Fridman, N. M. Dyatlova, V. K. Trunov, et al., Koord. Khim. 7(11), 1638 (1981).
M. V. Leont’eva and A. Ya. Fridman, Koord. Khim. 14(3), 320 (1988).
G. M. Sheldrick, Acta Crystallogr., Sect. A: Found. Crystallogr. 46, 467 (1990).
G. M. Sheldrick, SHELXL97. Program for the Refinement of Crystal Structures (Univ. of Göttingen, Göttingen, 1997).
D. L. McFadden, A. T. McPhail, C. D. Garner, and F. E. Mabbs, J. Chem. Soc., Dalton Trans., No. 3, 263 (1975).
G. Fransson and B. K. S. Lundberg, Acta Chem. Scand. 26(10), 3969 (1972).
G. Ivarsson, Acta Chem. Scand. 27(9), 3523 (1973).
C. K. Prout, G. B. Allison, and F. J. C. Rossotti, J. Chem. Soc. A, No. 21, 3331 (1971).
C. Maricondi, S. Utsuno, D. J. Radanovic, et al., Inorg. Chim. Acta 142(1), 135 (1988).
C. Bronca-Cabarrecq, B. Marrot, and A. Mosset, Acta Crystallogr., Sect. C: Cryst. Struct. Commun. 52(8), 1903 (1996).
E. Serrano-Padial, D. Choquesillo-Lazarte, E. Bugello-Altamirano, et al., Polyhedron, Nos. 14–15, 1451 (2002).
F. S. Stephens, J. Chem. Soc., No. 11, 1723 (1969).
Ya. M. Nesterova and M. A. Porai-Koshits, Koord. Khim. 10(1), 129 (1984).
M. Insausti, J. L. Pizarro, L. Lezama, et al., Chem. Mater. 6(5), 707 (1994).
C.-C. Wang, C.-H. Yang, C.-H. Lee, and G.-H. Lee, Inorg. Chem. 41(2), 429 (2002).
L. M. Shkol’nikova, A. L. Poznyak, and S. S. Sotman, Zh. Neorg. Khim. 40(5), 776 (1995).
A. Castineiras, J. M. Tercero, A. Matilla, et al., J. Coord. Chem. 35(1–2), 61 (1995).
I. F. Burshtein, A. L. Poznyak, and L. V. Stopolyanskaya, Zh. Neorg. Khim. 44(8), 1251 (1999) [Russ. J. Inorg. Chem. 44 (8), 1179 (1999)].
Author information
Authors and Affiliations
Additional information
Original Russian Text © A.S. Antsyshkina, G.G. Sadikov, A.L. Poznyak, V.S. Sergienko, 2006, published in Zhurnal Neorganicheskoi Khimii, 2006, Vol. 51, No. 2, pp. 283–294.
Rights and permissions
About this article
Cite this article
Antsyshkina, A.S., Sadikov, G.G., Poznyak, A.L. et al. Crystal structure of [Cu2(Edta)(Py)2(H2O)2] · 2H2O and [Cu(Im)6]{;Cu(Im)4[Cu(Edta)(Im)]2} · 6H2O, Products of the interaction of (Ethylenediaminetetraacetato)diaquadicopper(II) with pyridine and imidazole. Russ. J. Inorg. Chem. 51, 241–252 (2006). https://doi.org/10.1134/S0036023606020124
Received:
Issue Date:
DOI: https://doi.org/10.1134/S0036023606020124