Synthesis and application of a new selenoplatinum catalyst

The reaction of 4-methyl-5-ethoxycarbonyl-1,2,3-selenadiazole with (PPh3)4Pt leads to the formation of a new platinum-containing heterocyclic system. It was found that the selenoplatinum complex is a selective catalyst for the hydrosilylation of terminal alkynes to yield β-(Z)- and β-(E)-silylethylenes.