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Crystal structure of tris-[4-(di-methyl-amino)-pyridinium] tris-(oxalato-κ(2) O,O')chromate(III) tetra-hydrate.

Makon Ma Houga N, Capet F, Nenwa J, Bebga G, Foulon M - Acta Crystallogr E Crystallogr Commun (2015)

Bottom Line: In the title hybrid salt, (C7H11N2)3[Cr(C2O4)3]·4H2O, the central Cr(III) ion of the complex anion (point group symmetry 2) is coordinated by six O atoms from three chelating oxalate(2-) ligands in a slightly distorted octa-hedral coordination sphere.The Cr-O bond lengths vary from 1.9577 (11) to 1.9804 (11) Å, while the chelate O-Cr-O angles range from 82.11 (6) to 93.41 (5)°.In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the cations and anions into a three-dimensional network. π-π inter-actions between the pyridine rings of adjacent cations provide additional stabilization of the crystal packing, with the closest centroid-to-centroid distances being 3.541 (1) and 3.575 (1) Å.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Inorganic Chemistry, University of Yaounde 1, POB 812 Yaounde, Cameroon.

ABSTRACT
In the title hybrid salt, (C7H11N2)3[Cr(C2O4)3]·4H2O, the central Cr(III) ion of the complex anion (point group symmetry 2) is coordinated by six O atoms from three chelating oxalate(2-) ligands in a slightly distorted octa-hedral coordination sphere. The Cr-O bond lengths vary from 1.9577 (11) to 1.9804 (11) Å, while the chelate O-Cr-O angles range from 82.11 (6) to 93.41 (5)°. The 4-(di-methyl-amino)-pyridinium cations (one situated in a general position and one on a twofold rotation axis) are protonated at the pyridine N atoms. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the cations and anions into a three-dimensional network. π-π inter-actions between the pyridine rings of adjacent cations provide additional stabilization of the crystal packing, with the closest centroid-to-centroid distances being 3.541 (1) and 3.575 (1) Å.

No MeSH data available.


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Projection on the ab plane of the crystal structure of the title compound. Hydrogen bonds are shown as dashed lines.
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fig2: Projection on the ab plane of the crystal structure of the title compound. Hydrogen bonds are shown as dashed lines.

Mentions: In the title compound, the crystal packing is stabilized by a network of inter­molecular N—H⋯O and O—H⋯O hydrogen bonds linking the coordination octa­hedra, 4-(di­methyl­amino)­pyridinium cations and lattice water mol­ecules (Table 1 ▸, Fig. 2 ▸). In addition, π–π stacking inter­actions [centroid-to-centroid distances of 3.541 (1) and 3.575 (1) Å] between the pyridine rings contribute to the stabilization of the three-dimensional network (Fig. 3 ▸).


Crystal structure of tris-[4-(di-methyl-amino)-pyridinium] tris-(oxalato-κ(2) O,O')chromate(III) tetra-hydrate.

Makon Ma Houga N, Capet F, Nenwa J, Bebga G, Foulon M - Acta Crystallogr E Crystallogr Commun (2015)

Projection on the ab plane of the crystal structure of the title compound. Hydrogen bonds are shown as dashed lines.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4645054&req=5

fig2: Projection on the ab plane of the crystal structure of the title compound. Hydrogen bonds are shown as dashed lines.
Mentions: In the title compound, the crystal packing is stabilized by a network of inter­molecular N—H⋯O and O—H⋯O hydrogen bonds linking the coordination octa­hedra, 4-(di­methyl­amino)­pyridinium cations and lattice water mol­ecules (Table 1 ▸, Fig. 2 ▸). In addition, π–π stacking inter­actions [centroid-to-centroid distances of 3.541 (1) and 3.575 (1) Å] between the pyridine rings contribute to the stabilization of the three-dimensional network (Fig. 3 ▸).

Bottom Line: In the title hybrid salt, (C7H11N2)3[Cr(C2O4)3]·4H2O, the central Cr(III) ion of the complex anion (point group symmetry 2) is coordinated by six O atoms from three chelating oxalate(2-) ligands in a slightly distorted octa-hedral coordination sphere.The Cr-O bond lengths vary from 1.9577 (11) to 1.9804 (11) Å, while the chelate O-Cr-O angles range from 82.11 (6) to 93.41 (5)°.In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the cations and anions into a three-dimensional network. π-π inter-actions between the pyridine rings of adjacent cations provide additional stabilization of the crystal packing, with the closest centroid-to-centroid distances being 3.541 (1) and 3.575 (1) Å.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Inorganic Chemistry, University of Yaounde 1, POB 812 Yaounde, Cameroon.

ABSTRACT
In the title hybrid salt, (C7H11N2)3[Cr(C2O4)3]·4H2O, the central Cr(III) ion of the complex anion (point group symmetry 2) is coordinated by six O atoms from three chelating oxalate(2-) ligands in a slightly distorted octa-hedral coordination sphere. The Cr-O bond lengths vary from 1.9577 (11) to 1.9804 (11) Å, while the chelate O-Cr-O angles range from 82.11 (6) to 93.41 (5)°. The 4-(di-methyl-amino)-pyridinium cations (one situated in a general position and one on a twofold rotation axis) are protonated at the pyridine N atoms. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the cations and anions into a three-dimensional network. π-π inter-actions between the pyridine rings of adjacent cations provide additional stabilization of the crystal packing, with the closest centroid-to-centroid distances being 3.541 (1) and 3.575 (1) Å.

No MeSH data available.


Related in: MedlinePlus