The chloride ligand in the diastereomer mixture (R R u ,S C )- and (S R u ,S C )-[(η 6 -C 6 H 6 )Ru(LL * )Cl], 1a and 1b (ratio 86:14), was abstracted in acetone at -30 to -40 o C by AgPF 6 [HLL * = (S)-(1-phenylethyl)salicylaldimine]. X-ray analysis of crystals of the product [(η 6 -C 6 H 6 )Ru(LL * )] 2 (PF 6 ) 2 . 2CO(CH 3 ) 2 3 shows a dimeric structure with opposite ruthenium configurations. Therefore, the dimer containing two salicylaldiminato ligands with the same chirality can be described as a ''quasi-meso'' stereoisomer. The complex is supposed to be formed from the solvate complexes with coordinated acetone during crystallisation. This assumption is in accord with the reactivity of 3 towards water in acetone. A conformational analysis based on the NMR spectroscopic results shows that the arrangement of the 1-phenylethyl groups relative to the [(η 6 -C 6 H 6 )Ru(LL * )] fragments is determined by the face-on orientation of the phenyl substituent with respect to the π-bonded benzene ligands.