Hexaaquabis[3,5-bis(hydroxyimino)-1-methyl-2,4,6-trioxocyclohexanido-κ²N³,O⁴]barium tetrahydrate

Abstract

In the title compound, [Ba(C7H5N2O5)2(H2O)6]·4H2O, the Ba2+ cation lies on a twofold rotation axis and is ten-coordinated by two 3,5-bis­(hy­droxy­imino)-1-methyl-2,4,6-trioxo­cyclo­hexa­n­ide oxo O atoms [Ba—O = 2.8715 (17) Å], two hy­droxy­imino N atoms [Ba—N = 3.036 (2) Å], and six water mol­ecules [Ba—O = 2.847 (2), 2.848 (2), and 2.880 (2) Å]. The 3,5-bis­(hy­droxy­imino)-1-methyl-2,4,6-trioxo­cyclo­hexa­nide monoanions act in a bidentate chelating manner, coordinating through an N atom of the non-deprotonated hy­droxy­imino group and an O atom of the neighboring oxo group. Two lattice water mol­ecules are located in the cavities of the framework and are involved in hydrogen bonding to O atoms of one of the coordinating water mol­ecules and the O atom of a keto group of the ligand. As a result, a three-dimensional network is formed.

Crystal structure of poly[μ2-aqua-aqua(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)hemi-μ4-oxalato-barium(II)]

“…Such compounds are of chemical interest, since a large number of potential donors available in the ligands predetermine a variety of coordination modes, which afford different geometries and dimensionalities of coordination polymers. Recently, we reported the synthesis, crystal structure and some properties of metal complexes of the 2,3,5,6tetraoxo-4-nitro-4-idene anion Dinh Do et al, 2013). The above-mentioned anion does not replace the water molecules from the inner sphere of the hydrated metal cations [M(H 2 O) 6 ] n+ , but can coordinate metal centres like sodium and silver(I).…”

Crystal structure of poly[μ2-aqua-aqua(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)hemi-μ4-oxalato-barium(II)]

“…Such compounds are of chemical interest, since a large number of potential donors available in the ligands predetermine a variety of coordination modes, which afford different geometries and dimensionalities of coordination polymers. Recently, we reported the synthesis, crystal structure and some properties of metal complexes of the 2,3,5,6tetraoxo-4-nitro-4-idene anion Dinh Do et al, 2013). The above-mentioned anion does not replace the water molecules from the inner sphere of the hydrated metal cations [M(H 2 O) 6 ] n+ , but can coordinate metal centres like sodium and silver(I).…”

Crystal structure of poly[μ2-aqua-aqua(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)hemi-μ4-oxalato-barium(II)]

“…Such compounds are of chemical interest, since a large number of potential donors available in the ligands predetermine a variety of coordination modes, which afford different geometries and dimensionalities of coordination polymers. Recently, we reported the synthesis, crystal structure and some properties of metal complexes of the 2,3,5,6tetraoxo-4-nitro-4-idene anion Dinh Do et al, 2013). The above-mentioned anion does not replace the water molecules from the inner sphere of the hydrated metal cations [M(H 2 O) 6 ] n+ , but can coordinate metal centres like sodium and silver(I).…”

Crystal structure of poly[μ2-aqua-aqua(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)hemi-μ4-oxalato-barium(II)]

“…Such compounds are of chemical interest, since a large number of potential donors available in the ligands predetermine a variety of coordination modes, which afford different geometries and dimensionalities of coordination polymers. Recently, we reported the synthesis, crystal structure and some properties of metal complexes of the 2,3,5,6tetraoxo-4-nitro-4-idene anion Dinh Do et al, 2013). The above-mentioned anion does not replace the water molecules from the inner sphere of the hydrated metal cations [M(H 2 O) 6 ] n+ , but can coordinate metal centres like sodium and silver(I).…”