EXAFS INVESTIGATIONS OF METAL-ORGANIC MOLECULES WITH THE GOAL OF STUDYING HOMOGENEOUSLY CATALYTIC-SYSTEMS IN-SITU

The investigations of Grignard compounds are very instructive for unde rstanding the principles of getting structural information on highly c omplex and simultaneously metal activated systems by means of EXAFS sp ectroscopy. The structural investigations of a model system for Friede l-Crafts alkylation and some metal complexes (metal = Zr, Mo, W, Re), which activate carbonyl groups selectively with respect to the subsequ ent ring cleavage of axially prosterogenic biaryl lactones, are report ed. As an actual held of metal organic research temperature dependent in situ EXAFS studies of the C-H-activation of substituted olefins are presented. It was possible to observe the course of the rearrangement reaction of an iridium olefin complex to the corresponding hydride (v inyl) iridium complex.