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4-(Dimethyl-amino)-pyridinium trans-diaqua-bis-[oxalato(2-)-?O,O]chromate(III).

ABSTRACT: In the title salt, (C(7)H(11)N(2))[Cr(C(2)O(4))(2)(H(2)O)(2)], the asymmetric unit contains one half-cation and one half-anion. The Cr atom, the C and N atoms involved in C- N(exocyclic) bonding and the N and H atoms of N-H groups lie on twofold rotation axis. The Cr(III) atom of the complex anion is six-coordinated in a distorted (4 + 2) octa-hedral geometry with four equatorial O atoms of two nearly coplanar oxalate and two quasi-axial aqua O atoms. In the crystal, the protonated N atoms of the pyridine rings are hydrogen bonded to the carbonyl O atoms of the anions, forming chains along [010]. These chains are connected by lateral O-H?O hydrogen bonds, stabilizing the structure.

SUBMITTER: Nenwa J

PROVIDER: S-EPMC3009100 | biostudies-literature | 2010 Oct

REPOSITORIES: biostudies-literature

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4-(Dimethyl-amino)-pyridinium trans-diaqua-bis-[oxalato(2-)-κO,O]chromate(III).

Nenwa Justin J Belombe Michel M MM Ngoune Jean J Fokwa Boniface P T BP

Acta crystallographica. Section E, Structure reports online 20101013 Pt 11

In the title salt, (C(7)H(11)N(2))[Cr(C(2)O(4))(2)(H(2)O)(2)], the asymmetric unit contains one half-cation and one half-anion. The Cr atom, the C and N atoms involved in C- N(exocyclic) bonding and the N and H atoms of N-H groups lie on twofold rotation axis. The Cr(III) atom of the complex anion is six-coordinated in a distorted (4 + 2) octa-hedral geometry with four equatorial O atoms of two nearly coplanar oxalate and two quasi-axial aqua O atoms. In the crystal, the protonated N atoms of th ...[more]

PMID: 21588840

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