Reference of 37366-09-9. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer. In a document type is Article, introducing its new discovery.
Arene ruthenium(II) complexes containing bis(pyrazolyl)methane ligands have been prepared by reacting the ligands L? (L? in general; specifically L1 = H2C(pz)2, L2 = H2C(pzMe2)2, L3 = H2C(pz4Me)2, L4 = Me2C(pz)2 and L5 = Et 2C(pz)2 where pz = pyrazole) with [(arene)RuCl(mu-Cl)] 2 dimers (arene = p-cymene or benzene). When the reaction was carried out in methanol solution, complexes of the type [(arene)Ru(L?)Cl]Cl were obtained. When L1, L2, L3, and L5 ligands reacted with excess [(arene)RuCl(mu-Cl)]2, [(arene)Ru(L?)Cl][(arene)RuCl3] species have been obtained, whereas by using the L4 ligand under the same reaction conditions the unexpected [(p-cymene)Ru(pzH)2Cl]Cl complex was recovered. The reaction of 1 equiv of [(p-cymene)Ru(L?)Cl]Cl and of [(p-cymene)Ru(pzH) 2Cl]Cl with 1 equiv of AgX (X = O3SCF3 or BF4) in methanol afforded the complexes [(p-cymene)Ru(L?)Cl] (O3SCF3) (L? = L1 or L2) and [(p-cymene)Ru(pzH)2Cl]BF4, respectively. [(p-cymene)Ru(L1)(H2O)][PF6]2 formed when [(p-cymene)Ru(L1)Cl]Cl reacts with an excess of AgPF 6. The solid-state structures of the three complexes, [(p-cymene)Ru{H2C(pz)2}Cl]Cl, [(p-cymene)Ru{H 2Cpz4Me)2}Cl]Cl, and [(p-cymene)Ru{H 2C(pz)2}Cl](O3SCF3), were determined by X-ray crystallographic studies. The interionic structure of [(p-cymene)Ru(L1)Cl](O3SCF3) and [(p-cymene)Ru(L?)Cl][(p-cymene)RuCl3] (L? = L1 or L2) was investigated through an integrated experimental approach based on NOE and pulsed field gradient spin-echo (PGSE) NMR experiments in CD2Cl2 as a function of the concentration. PGSE NMR measurements indicate the predominance of ion pairs in solution. NOE measurements suggest that (O3SCF3)- approaches the cation orienting itself toward the CH2 moiety of the L 1 (H2C(pz)2) ligand as found in the solid state. Selected Ru species have been preliminarily investigated as catalysts toward styrene oxidation by dihydrogen peroxide, [(p-cymene)Ru(L 1)(H2O)][PF6]2 being the most active species.
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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI