Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Compounds , ad, , were prepared in three-phase catalytical systems using selenium and tellurium metals as one phase. A radical anion chain mechanism is proposed in the reaction of tellurium metal with phenylacetylene. ... Compounds , a–d, , were prepared in three-phase ...