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)
E.E. Netreba1, E.A. Sarnit1, S.V. Shabanov1, A.A. Velikozhon1, N.V. Somov2
1Taurida Academy of Vernadsky Crimean Federal University, Simferopol, Russia
2Lobachevsky State University, Nizhny Novgorod, Russia
Keywords: бициклические бисмочевины, мебикар, европий(III), структура, десятивершинник, ИК, РСА, bicyclic bisureas, mebicar, europium(III), structure, 10-vertex polyhedron, IR, single crystal XRD
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 , a = 9.8343(4) Å , b = 10.2544(4) Å, c = 10.9411(4) Å, a= 74.366(3)°, = 67.734(4)°, b= 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) .
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