Abstract
A centrosymmetric binuclear complex of europium(III) nitrate with bicyclic bisurea (2,4,6,8-tetramethyl-2,4,6,8-tetraazabicyclo(3.3.0)octane-3,7-dione, or mebicar, Mk) [Eu(C8H14N4O2)(H2O)2(NO3)3]2 (I) is synthesized and its atomic structure (CIF file CCDC No. 1451437) is determined. The crystals of I are triclinic: space group \(P\overline 1 \), a = 9.8343(4) Å, b = 10.2544(4) Å, c = 10.9411(4) Å, α = 74.366(3)°, β = 67.734(4)°, γ = 67.673(4)°, V = 934.32(7) Å3, ρ(calc.) = 2.03398 g/cm3, Z = 1. The europium atom is coordinated by two oxygen atoms of two Mk molecules connected by a symmetry operation, three bidentate nitrate anions, and two water molecules. The coordination polyhedron of the europium atom is a 10-vertex polyhedron, the Eu…Eu distance is 9.7433(6) Å.
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Translated from Zhurnal Strukturnoi Khimii, Vol. 57, No. 4, pp. 792-797, May-June, 2016.
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Netreba, E.E., Sarnit, E.A., Shabanov, S.V. et al. Crystal structure of a new binuclear complex bis(2,4,6,8-tetramethyl-2,4,6,8-tetraazabicyclo(3.3.0)octane-3,7-dione-o,o′)-tetraaqua-hexakis(nitrato-o,o′)-dieuropium(III). J Struct Chem 57, 754–759 (2016). https://doi.org/10.1134/S0022476616040181
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DOI: https://doi.org/10.1134/S0022476616040181