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Related Products of 37366-09-9. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer
The reaction of <(Ru(eta6-C6H6)Cl2)2> with the sodium salt of (S)-N-(1-phenylethyl)salicylideneamine (HL-L) in CH2Cl2 led to a diastereomer mixture of (RRu,SC)- and (SRu,SC)- 1a and 1b, in a ratio of 86:14.Mediated by AgPF6 in acetone at -30 to -35 deg C, the chloride ligand in 1a/1b was substituted by 4-methylpyridine (4Me-py), 2-methylpyridine (2Me-py) or triphenylphosphane (PPh3) to give the two diastereomers 2a/2b of PF6, the pure diastereomer 3 of PF6 and the two diastereomers 4a/4b of PF6.At room temperature in <(2)H6>acetone, under equilibrium conditions, the diastereomer ratio 2a:2b was 67:33, 3 was diastereomerically pure and the ratio 4a:4b was 93.4:6.6.Variable-temperature 1H NMR spectroscopy of complexes 2a/2b and 4a/4b from -80 deg C to room temperature demonstrated configurational lability of the ruthenium configuration.Since equilibration occured during reaction and work-up, the ruthenium configuration was not retained in the substitution reactions.Diastereomer 2a was obtained diastereomerically pure by crystallisation.The diastereomers 4a and 4b were separated and examined by variable-temperature NMR spectroscopy.The crystal structures of the (RRu,SC) diastereomer of complex 1 and of the thermodynamically more stable (RRu,SC) diastereomers 2a and 4a” were determined by X-ray analysis.A conformational analysis based on the NMR spectroscopic results showed that two main factors govern the orientation of the 1-phenylethyl group relative to the moiety (L’=Cl, 4Me-py, 2Me-py or PPh3): (i) the face-on orientation of the phenyl substituent with respect to the ?-bonded aromatic benzene ligand and (ii) the steric demand of the unidentate ligands with respect to the 1-phenylethyl group.
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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI