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Bayero Journal of Pure and Applied Sciences

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Synthesis and single crystal structure analysis of 3,3',5,5'-tetramethyl-4,4'-bipyrazolium tetrachlorocobaltate(ii) monohydrate [H2ME4BPZ][CoCl4]·H2O

MA Kurawa, AG Orpen

Abstract


Slow evaporation of a solution of 3,3',5,5'-tetramethyl-4,4'-bipyrazolium chloride ([H2Me4bpz]Cl2) with the cobalt chloride in concentrated aqueous HCl solution yielded block blue crystals and X-ray single crystal structure determination at 100K revealed that the molecule crystallized in the monoclinic system with a P21/n space group. The asymmetric units consist of tetrahedral [CoCl4]2- anions and tetramethyl bipyrazolium [H2Me4bpz]2+ dications and one water molecule which are connected through N—H····Cl and N—H····O hydrogen bond networks in the crystal lattice.

Keywords: Crystal structure, Hydrogen bond and crystal engineering




http://dx.doi.org/10.4314/bajopas.v8i2.15
AJOL African Journals Online