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A heterogeneous precursor with respect to the metathesis of olefins has been prepared by a controlled thermal reaction between π-C 5 H 5 W(CO) 3 Cl and a silica support. Activated by iBuAlCl 2 the catalyst is reusable without any loss of tungsten. Compared to the WO 3 /SiO 2 system, the new catalyst is superior with respect to conversion and initial...
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