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

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. ?-? 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.

SUBMITTER: Makon Ma Houga N

PROVIDER: S-EPMC4645054 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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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 Noé N Capet Frédéric F Nenwa Justin J Bebga Gouet G Foulon Michel M

Acta crystallographica. Section E, Crystallographic communications 20151031 Pt 11

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 ...[more]

PMID: 26594521

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