Abstract
Reddish-orange single crystals of hexaamminecobalt(III) chloride selenate trihydrate, [Co(NH3)6]ClSeO4· 3H2O, have been prepared by reacting aqueous solutions of hexaamminecobalt(III) chloride and potassium selenate in a 1 : 1 molar ratio. The salt was characterized by elemental analyses, thermogravimetry, magnetic moment and spectroscopic studies (IR, electronic). A single crystal X-ray structure determination revealed that the title complex salt crystallizes in the orthorhombic space group Pnma with a = 18.230(2), b = 8.591(2), c = 8.593(2) Å, V = 1345.9(4) Å3, Z = 4, R = 0.0400 and Rw = 0.0980. In the salt the network of hydrogen bonds between the hexaamminecobalt(III) cation, water molecule, chloride and oxygen atoms of the selenate ion represents the second sphere coordination and also suggests that [Co(NH3)6]3+ may be used as an anion receptor for the selenate ion.
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