Abstract
A new complex [K(Db18C6)]+[FeCl4]− (I) is synthesized and its structure is studied by X-ray diffraction analysis. The crystals are triclinic: space group P \( \bar 1 \), a = 17.998, b = 18.670, c = 19.590 Å, α = 106.61°, β = 104.55°, γ = 113.87°, Z = 8. The structure is solved by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.057 by 13 670 independent reflections (CAD-4 automated diffractometer, λMoK α). All the four independent complex cations [K(Db18C6)]+ are host-guest, and in each complex cation the K+ cation is localized in the cavity of the Db18C6 crown ligand. The coordination polyhedron of K+ (coordination number nine) is a distorted hexagonal bipyramid with the base of all six O atoms of the Db18C6 ligand, the axial vertex at the Cl atom of the [FeCl4]− anion, and another bifurcated axial vertex at two Cl atoms of another [FeCL4]− anion. All the four independent [FeCL4]− anions are orientationally disordered and have somewhat distorted tetrahedral structure. In crystal I, the alternating complex cations [K(Db18C6)]+ and [FeCL4]− anions form infinite polymer chains by the K-Cl bonds.
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References
Host-Guest Complex Chemistry. Macrocycles. Synthesis, Structures, Applications, Vogtle, F. and Weber, E., Eds., Berlin: Springer, 1985.
Rogers, R.D. and Song, Y., Chem. Crystallogr., 1995, vol. 25, no. 9, p. 579.
North, A.C.T., Philips, D.C., and Mathews, F.S., Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr., 1968, vol. 24, no. 3, p. 351.
Sheldrick, G.M., The SHEL-97. Manual, Göttingen (Germany): Univ. of Göttingen, 1997.
Shannon, R.D., Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr., 1976, vol. 32, no. 5, p. 751.
Batsanov, S.S., Zh. Neorg. Khim., 1991, vol. 36, no. 12, p. 3015.
Pauling, L., The Nature of the Chemical Bond, New York: Cornell Univ., 1960.
Bondi, A., J. Phys. Chem., 1964, vol. 68, no. 3, p. 441.
Alleb, F.H., Kennard, O., and Watson, D.G., et al., J. Chem. Soc., Perkin Trans., 1987, no. 12, p. 2.
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Original Russian Text © A.N. Chekhlov, 2009, published in Koordinatsionnaya Khimiya, 2009, Vol. 35, No. 6, pp. 472–475.
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Chekhlov, A.N. (Dibenzo-18-crown-6)potassium tetrachloroferrate(III): Synthesis and crystal structure. Russ J Coord Chem 35, 464–467 (2009). https://doi.org/10.1134/S107032840906013X
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DOI: https://doi.org/10.1134/S107032840906013X