Reactions of monoazadienes with metal carbonyl complexes. IX. On the relation of the dynamic behavior between the two diastereomers of the linear tetranuclear ruthenium cluster Ru4(CO)10[CH3C=C(H)C(H)=N-i-Pr]2 and their isolobal counterparts [.eta.5-CpM(CO)2]2 (M = iron, ruthenium)

Abstract

The two diameters of the linear tetranuclear cluster Ru 4 (CO) 10 [CH 3 C=C(H)C(H)=N-i-Pr] 2 , (CA,/AC)-(1a) and (CC/AA)-1a, have been separated by preparative HPLC. Two different modes for diastereometer interconversion have been assessed; a thermally induced isomerization which proceeds intermolecularly, and a CO induced isomerization which occurs intramolecularly, as could be shown employing labeling experiments.