Poly[(6-carboxypicolinato-κ3 O 2,N,O 6)(μ3-pyridine-2,6-dicarboxylato-κ5 O 2,N,O 6:O 2′:O 6′)dysprosium(III)]
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چکیده
In the title complex, [Dy(C(7)H(3)NO(4))(C(7)H(4)NO(4))](n), one of the ligands is fully deprotonated while the second has lost only one H atom. Each Dy(III) ion is coordinated by six O atoms and two N atoms from two pyridine-2,6-dicarboxyl-ate and two 6-carboxy-picolinate ligands, displaying a bicapped trigonal-prismatic geometry. The average Dy-O bond distance is 2.40 Å, some 0.1Å longer than the corresponding Ho-O distance in the isotypic holmium complex. Adjacent Dy(III) ions are linked by the pyridine-2,6-dicarboxyl-ate ligands, forming a layer in (100). These layers are further connected by π-π stacking inter-actions between neighboring pyridyl rings [centroid-centroid distance = 3.827 (3) Å] and C-H⋯O hydrogen-bonding inter-actions, assembling a three-dimensional supra-molecular network. Within each layer, there are other π-π stacking inter-actions between neighboring pyridyl rings [centroid-centroid distance = 3.501 (2) Å] and O-H⋯O and C-H⋯O hydrogen-bonding inter-actions, which further stabilize the structure.
منابع مشابه
catena-Poly[4,4′-bipyridinium [[tetraaqua(pyridine-2,6-dicarboxylato-κ3 O 2,N,O 6)cerate(III)]-μ-pyridine-2,6-dicarboxylato-κ4 O 2:O 2′,N,O 6-[(pyridine-2,6-dicarboxylato-κ3 O 2,N,O 6)cerate(III)]-μ-pyridine-2,6-dicarboxylato-κ4 O 2,N,O 6:O 6′] pentahydrate]
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