Publications scientifiques
2010Article de revueanglais
4-(Dimethylamino)pyridinium trans -diaquabis[oxalato(2−)-κ 2 O 1 , O 2 ]chromate(III) (ouvre dans un nouvel onglet)
Auteurs
Université de Yaoundé I
Michel M. Bélombé
Vérification de la session…
Publications scientifiques
Michel M. Bélombé
Jean Ngouné
Boniface P. T. Fokwa
Acta Crystallographica Section E Structure Reports Online
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.