Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 5 (May 2013)


metal-organic compounds



sj5313 scheme

Acta Cryst. (2013). E69, m248-m249    [ doi:10.1107/S1600536813008945 ]

trans-Dichloridotetrakis[(dimethylphosphoryl)methanaminium-[kappa]O]cobalt(II) tetrachloridocobaltate(II)

G. J. Reiss

Abstract: The asymmetric unit of the title structure, [CoCl2(C3H11NOP)4][CoCl4]2, consists of one half of the trans-dichloridotetrakis[(dimethylphosphoryl)methanaminium]cobalt(II) tetracation lying on an inversion center and one tetrachloridocobaltate(II) dianion on a general position. Four O-coordinated cationic (dimethylphosphoryl)methanaminium (dpmaH+) ligands occupy the equatorial coordination sites, whereas the chloride ligands occupy axial positions of the roughly octahedral coordination polyhedron of the cobalt metal center. Intramolecular hydrogen bonds between the aminium groups and the O atom of the phosphoryl groups and additional hydrogen bonds between the aminium groups and the chloride ligands are present. Furthermore, four of the six H atoms not involved in intramolecular bonding of each cobalt(II) tetracation form weak hydrogen bonds to four adjacent tetrachloridocobaltate(II) counter-anions. By these intermolecular hydrogen bonds, one-dimensional polymeric strands are formed along the b-axis direction. The hydrogen bonding is analyzed using the graph-set method and the structural similarity with dpmaHCl is discussed.


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