METAL ADDUCTS OF DISELENIUM DINITRIDE

Adducts of diselenium dinitride, a species as yet unknown in the free state, may be prepared with either palladium or aluminium as the metal centre. Thus salts of [Pd2X6](2-) (X = Cl or Br) react with Se4N4 at 100 degrees C in CH2Cl2 to give [Pd2X6(Se2N2)](2-) while A1X(3) reacts with the same reagent, at ambient temperatures in CH2X2 to give [(A1X (3))(2)(Se2N2)]. When X = Cl in the latter case the product cannot be obtained in pure crystalline form; here we present IR data which confi rms the presence of the neutral Se2N2 unit.