Application 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.
The reaction of [(eta6-C6H6)RuCl2]2 with the sodium salt of (+)(S)-N-(1-phenylethyl)-pyrrolecarbaldimine (HLL*) in CH2Cl2 yielded a mixture of the two diastereomers (SRu,SC)-and (RRu,SC)-[(eta6-C6H 6)Ru(LL*)Cl] (1a,b) in a ratio of 68:32. The chloride ligand in 1a,b was replaced in methanol by triphenylphosphane to give the two diastereomers (SRu,SC)-and (RRu,SC)-[eta6-C6H 6)Ru(LL*)(PPh3)]PF6 (2a,b). According to variable-temperature 1H NMR studies the formation of configurationally labile solvate intermediates has to be assumed in the reaction of the chloro complexes 1a,b with triphenylphosphane in the solvent methanol. In contrast to the diastereomers 1a,b, the ruthenium configuration in the phosphane complexes 2a,b is configurationally stable at room temperature. The diastereomers 2a,b were separated by crystallization. The crystal structures of (SRu,SC)-1a, (SRu,SC)-2a, and (RRu,SC)-2b were determined by X-ray analysis. The epimerization of 2b at 85 C in nitromethane-d3 gave a 93.5:6.5 equilibrium mixture of 2a and 2b (tau1/2 (min) = 58.2 ± 0.4). Conformational analyses showed that two main factors govern the orientation of the 1-phenylethyl group relative to the [(eta6-C6H6)Ru(LL*)X] moiety (X = Cl, PPh3): (i) the faceon orientation of the phenyl substituent with respect to the pi-bonded benzene ligand and (ii) the orientation of the hydrogen substituent toward the unidentate ligand L.
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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI