[{Ru(NH3)5}2(pyrazine)]6+

cis-[Ru(NH3)4(2,2'-bipyridine)](2+)

{Ru2(NH3)10(pyrazine)}(CF3SO3)4

[Ru(NH3)5(pyrazine)](2+)

tris(2,2'-bipyridyl)cobalt(II)