Synthesis and crystal structure of the two-dimensional coordination compound potassium oxo-bis(hydroxylamido)-pyridine-2, 3-dicarboxylato-vanadate(V)
2015
Li, Xiu-Cai | Zhang, Heng-Qiang | Yang, Qiong | Zhang, Qi-Ying
The crystal structure of the title compound, K₂[VO(C₇H₃O₄N)(NH₂O)₂(H₂O)]₂, is composed of KO₉ and VO₅N₂ polyhedra connected through pyridine-2,3-dicarboxylate (2,3-dipicolinate) bridges. The VO₅N₂ coordination polyhedron is a pentagonal bipyramid, with hydroxylamido and dipicolinato ligands being bidentate. The axial positions are occupied by the terminal oxo ligand and one oxygen atom from a deprotonated carboxylate group. The oxygen atoms from hydroxylamido and the nitrogen atoms belonging either to the pyridine ring or to the hydroxylamido occupy the equatorial positions and form an approximate pentagonal plane. The irregular KO₉ polyhedra are linked, sharing edges and planes to form infinite chains. These chains are linked by the dipicolinate bridges to form layers. The distorted VO₅N₂ polyhedron is grafted on to the layer by the dipicolinate carboxylate O atom. Adjacent layers are connected through N–H···O hydrogen bonds to form a three-dimensional supramolecular structure.
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