Abstract
The reactions of the P/Se-precursor Woollins' reagent [PhP(Se)mu-Se](2) with alkali-metal salts offer new perspectives for the synthesis of metal aggregates containing P - Se anions. Depending on the alkali-metal thiolates polymeric arrangements of [PhPSe3](2-) or [PhPSe2Se - SeSe2PPh](2-) dianions are observed and the mechanisms of their formation described.