Electrochemical synthesis and a redetermination of Ni(acac)2(H2O)2 • H2O

The title complex, bis(acetylacetonato)diaquanickel(II) monohydrate, [Ni(C5H7O2)(2)(H2O)2)].H2O, was easily synthesized in high yield by electrochemical dissolution of nickel metal in an acetylacetone and ethanol solution via direct hydrolysis of the electrolyte solution at a temperature of 333 K. The crystal structure shows octahedral coordination of nickel with two trans aqua ligands. An uncoordinated water molecule engages in hydrogen bonding.