165463-01-4Relevant academic research and scientific papers
Organometallic cluster complexes with face-capping arene ligands, 91. Hydrogenation of the side-chain in [{(C5H5)Co}3(μ3-alkenylbenzene)]: Synthesis and structure of the cluster complexes [{(C5H5)Co}3(μ3-η 2:η2:η2-C6H5-CHR1-CH2R2)]2
Wadepohl, Hubert,Buechner, Klaus,Herrmann, Michael,Pritzkow, Hans
, p. 22 - 29 (1999)
Catalytic hydrogenation (1 bar H2, 20°C, Pd/C catalyst) of the C=C double bond in the side-chain of the facial alkenylbenzene ligands of the cluster complexes [{(C5H5)Co}3{μ3-C 6H5(CR1)(CHR2)}] 2b-c gave the derivatives [{(C5H5)Co}3{μ3-C 6H5(CHR1)(CH2R2)}] 3b-d in high yield (b, R1=CH3, R2=H; c, R1=H, R2=Ph; d, R1=Ph, R2=H). The X-ray crystal and molecular structures of 3c and 3d were determined. In both derivatives a facial μ3-η2:η2:η2 coordination of one phenyl ring to the tricobalt cluster was found. Only one of two possible diastereomeric conformers is present in the crystals of 3d. The expanded μ3-phenyl rings show a small but statistically significant Kekule-type (trigonal) distortion. In solution hindered rotation of the μ3-arenes on top of the [(C5H5)Co]3 clusters is observed by NMR spectroscopy.
