A new procedure to synthesize cis-[Ru(NH3)4L2](n+) species containing ruthenium(II) or ruthenium(III) using tetraamino (3,4-diolatobenzoato)ruthenium(II) as precursor

Article abstract of DOI:10.1016/0020-1693(95)90086-L

The preparation of [Ru(NH3)4(diox-COO)], where diox-COO is 3,4-diolatobenzoate, was achieved using pentamminechlororuthenium(III) chloride and 3,4-dihydroxybenzoic acid in basic medium. The neutral quinone complex is extremely soluble in water and easily purified by ion-exchange chromatography. The chemical or electrochemical reduction, in acidic medium, produces cis-[Ru(NH3)4(H2O)2](2+), indicating this dioxolene ruthenium complex to be useful precursor to prepare cis-tetraammineruthenium(II) or ruthenium(III) species.