H. Brunner, R. Oeschey, B. Nuber
Jul 12, 1996
Citations
0
Influential Citations
19
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract The chloride ligand in the diastereomer mixture ( R Ru , S C )- and (S Ru ,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°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 · 2 CO(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.