“…One decade after the first characterization of Zintl ions by Kummer and Diehl [1a] and Corbett,[1b,c] reactions of [Sn 9 ] 4À and [TlSn 8 ] 5À with [MA C H T U N G T R E N N U N G (PPh 3 ) 4 ] (M= Pd or Pt) [2] defined the beginning of an active investigation of Zintl ion reactivity toward transition-metal compounds. In the meantime, the reactivity of homoatomic Zintl anions [E 15 7 ] 3À (E 15 = P, As, or Sb) or [E 14 9 ] 4À (E 14 = Si, Ge, Sn, or Pb) has been comprehensively explored. [3] The homoatomic Group 15 nortricyclane Zintl anions can react with, for example, Group In the first case, species with h 4 or h 1 and h 4 coordination of the nortricyclane cage, such as [(h 4 -E 15 7 )M(CO) 3 ] 3À [4] or [(en)(CO) 3 WA C H T U N G T R E N N U N G (h 1 ,h 4 -P 7 )M(CO) 3 ] 3À , [5] were obtained, whereas the [E 15 7 ] 3À unit served as an h 2 ligand to Pt-complex fragments, as in [(h 2 -E 15 7 )PtHA C H T U N G T R E N N U N G (PPh 3 )] 2À (E 15 = P or As).…”