SYNTHESIS AND CRYSTAL STRUCTURE OF [La(NO3)3(H2O)2(BiPy)]В·1.5(BiPy)
L. Alexandrescu1, P. Bourosh2, O. Oprea1, I. Jitaru1
1Polytechnical University of Bucharest, Bucharest, Romania
2Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Moldova
Keywords: La(III) complex compound, synthesis, structure, crystal structure
Abstract
The molecular and crystal structure of the [La(NO3)3(H2O)2(2.2'-BiPy)]·1.5(2.2'-BiPy) compound is determined. The metal coordination polyhedron in the La(III) complex is formed from 10 donor atoms of O8N2: 6 oxygen atoms belong to three chelate-coordinated NO3¯ anions, 2 oxygen atoms belong to two water molecules, and 2 nitrogen atoms belong to a bidentate bipyridine molecule coordinated in the neutral form. The structure is based on the metal complexes linked together in chains through the O(W)-H⋯O hydrogen bonds, in which oxygen atoms of the coordinated NO3¯ anions act as acceptors. It is a framework structure, further stabilized by a system of O(W)-H⋯N and C-H⋯N hydrogen bonds, in which nitrogen atoms of the uncoordinated bipyridine molecules act as proton acceptors.
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