The individual diastereoisomeric forms [meso (Delta Lambda) and rac (Delta Delta and Lambda Lambda)] of the ligand-bridged dinuclear species [{Ru(phen)(Me(4)bpy)}(2)(mu-bpm)](4+) [phen = 1,10-phenanthroline; Me(4)bpy = 4,4',5,5'-tetramethyl-2,2'-bipyridine; bpm = 2,2'-bipyrimidine] have been synthesized using chiral forms of the precursors [Ru(phen)(Me(4)bpy) (bpm)](2+) and [Ru(phen) (Me(4)bpy)(py)(2)](2+). The cis and trans geometric isomers of both diastereoisomeric forms have been separated by cation exchange chromatography and characterized by NMR spectroscopy. We also report the first chiral resolutions of a heteroleptic tris(bidentate)ruthenium(II) complex, [Ru(phen)(Me(4)bpy)(bpm)](2+), and a heteroleptic bis(bidentate)bis(pyridine)ruthenium(II) complex, [Ru(phen)(Me(4)bpy)(py)(2)](2+), in both cases using cation exchange chromatography.