CATALYTIC PROPERTIES OF EIVB-SUBSTITUTED TUNGSTEN CARBONYL COMPLEXES (EIVB=Ge, Sn) IMMOBILIZED ON A SILICA SUPPORT

Article abstract of DOI:10.1016/S0022-328X(00)81381-9

The catalytic activity in olefin disproportionation of a 3,3-dimethyl-1-butene substrate has been investigated for a series of E^IVB-W(CO)3C5H5 species (E^IVB=Ge, Sn) chemically bonded to a high surface silica carrier.Different product distributions and conversion factors were obtained by thermal and UV activation of the catalysts, whereas variation of the E^IVB element had little effect.In all cases, isomerization was observed rather than disproportionation, probably because of steric interaction between the rather bulky t-Bu groups at the active W sites.