Pentaammineruthenium(II/III) imidazole and imidazolate complexes of 2-carboxylatoimidazole and 2-imidazolecarboxaldehydeorgano‐ruthenium compoundsThe Ru(II) title complexes are prepared by reduction of ((NH 3 ) 5 RuCl) 2 + over Zn/Hg and reaction of the resulting ((NH 3 ) 5 Ru(H 2 O))...