WOLF-W. DU #ONT*, RALPH HENSEL, SILVIA KUBINIOK, LUTZ LANGE AND TEVFIK SEVERENGIZ Fachbereich Chemie der Universi tat Oldenburg Postfach 25 03, 0-2900 Oldenburg, FR Germany ... Abstract selenium, tellurium and organic ditellurides have been studied Reactions of diphosphanes and cyclophosphanes with ... The first case of an insertion of tellurium into a phosphorus- phosphorus bond was established when tetra-t-butyldiphosphane reacted with elemental tellurium in ...