To explore the structural transformation of cyclopentadienyl ruthenium (CpRu) complexes in response to external stimuli, the reaction of [RuCp(MeCN)₃][X] (X = PF₆, (FSO₂)₂N [= FSA]) and tris(alkylthio)benzenes (1,3,5-C₆H₃(SR)₃; L ¹ : R = Pr, L ² : R = Me) was investigated, and the crystal structures and thermal properties of the products were examined. The reaction produced the sandwich complexes [RuCpL ⁿ ][X] or dinuclear complexes [Ru₂Cp₂(μ-L ⁿ )₂(CH₃CN) _m ][X]₂ (X = PF₆, FSA) depending on the reaction conditions. The sandwich complex [RuCpL ¹ ][FSA] was an ionic liquid. The solids of dinuclear complexes transformed into the thermodynamically stable sandwich complexes upon heating accompanied by acetonitrile loss. This change resulted in a transformation from crystal to ionic liquid for complexes with the FSA anion. UV irradiation of the sandwich complex [RuCpL ¹ ][PF₆] in methanol produced the dinuclear complex [Ru₂Cp₂(μ-L ¹ )₂ L ¹ ₂][PF₆]₂. The complex transformed into the sandwich complex upon heating.

	Year	Citations

About