Synthesis of a Molecule with Five Different Adjacent Pnictogens

The first molecular compound with all five pnictogens was obtained by a multi‐step reaction. Lithiation of the (bisamido)diazadiarsetidine ( t BuNAs) 2 ( t BuNH) 2 in aliphatic solvents leads to the dimeric metallated species [( t BuNAs) 2 ( t BuNLi) 2 ] 2 ( 1 2 ). Upon reactions with AsCl 3 , SbCl 3 and BiCl 3 the polycyclic compounds [( t BuNAs) 2 ( t BuN) 2 ]PnCl (Pn=As ( 2 ), Sb ( 3 ), Bi ( 4 )) can be obtained. Conversion of 2 – 4 with [ t Bu 2 SbP( t Bu)Li(OEt 2 )] 2 leads to the remarkable interpnictogens [( t BuNAs) 2 ( t BuN) 2 ]PnP( t Bu)Sb t Bu 2 (Pn=As ( 5 ), Sb ( 6 ), Bi ( 7 )), whereby 7 is the first example of a molecule containing all five Group 15 elements. The compound with adjacent AsNBiPSb‐chains is surprisingly stable and does not show high sensibility against light as the labile Bi−P bond might suggest.