OPTICALLY-ACTIVE TRANSITION-METAL COMPLEXES .100. PHOTOCHEMICALLY INDUCED CIS-TRANS-ISOMERIZATION IN OPTICALLY-ACTIVE PHOSPHIDO BRIDGED IRON COMPLEXES OF THE TYPE (CPFE(MU-PR2)CO)2 AND (CP2FE2(MU-H) (MU-PR2) (CO)2)

Starting from the optically active PH phospholanes diopholane HPDph and tarpholane HPTph as well as HPMePh the phosphido bridged iron complexes 1-4 have been prepared and characterized. Complexes 1-4 form mixtures of cis-trans isomers with respect to the Cp and CO ligands. In addition, the complexes trans-2 and trans-3 exist as two diastereomers differing only in the configuration of the Fe atoms. Complexes 1-4 undergo in solution a photochemically induced cis-trans isomerization process, for which a CO dissociation is discussed. © 1990.