Abstract

Orange, single crystals of the bimetallic salt hexaamminecobalt(III) chloride molybdate trihydrate, [Co (NH3)6]ClMoO4·3H2O, have been prepared by reacting hot aqueous solutions of hexaamminecobalt(III) chloride and sodium molybdate dihydrate in a 1:1 molar ratio. The salt was characterized by elemental analyses and spectroscopic studies (IR and electronic). The title complex salt crystallizes in orthorhombic, space group Pnma, with a = 18.408(2), b = 8.672(1), c = 8.661(1) Å, V = 1382.6(3) Å3, Z = 4 and R = 0.0255. A single-crystal X-ray structure determination revealed the presence of discrete ions [Co(NH3)6]3+, Cl− and and three lattice water molecule in the solid state. The formation of this salt suggests that [Co(NH3)6]3+ may be used as an anion receptor for the molybdate ion.

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