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Treatment of hydrated ruthenium(III) chloride with tetra-2-pyridyl-1,4-pyrazine (tppz) in refluxing ethoxyethanol afforded the homoleptic dinuclear complex [(tppz)Ru( μ -tppz)Ru(tppz)] 4+  ( 1 ) besides small amounts of the species [Ru(tppz) 2 ] 2+ . The title complex  1  was obtained as purple crystals and characterized as its hexafluoridophosphate salt by NMR spectroscopy, mass spectrometry and microanalyses. The molecular structure of  1 (PF 6 ) 4  has been established by X-ray crystallography.

Synthesis and crystal structure of a homoleptic diruthenium complex containing tetra-2-pyridyl-1,4-pyrazine (tppz)