STUDISS ON HETERO-MACROCYULIC POLYETHER(Ⅲ).THE SYNTHESES OF 10-TELLURABENZO-15-CROWN-5 AND ITS PLATINUM COMPLEX AS WELL AS ITS CATALYTIC BEHAVIOR IN HYDROSILYLATION

The syntheses of a new type of heteromacrocyclic polyether- 2,3-benzo-1,4,7,13-tetraoxa-10-telluracyclopentadeca-2-ene(L),and its pla- tinum complex(PtL_2Cl_2)were described.The catalytic activity of this complex for the hydrosilylation of olefins by triethoxysilane was investigated.