(Ge 2 P 2 ) 2- : a binary analogue of P 4 as a precursor to the ternary cluster anion [Cd 3 (Ge 3 P) 3 ] 3 .

The novel binary P4 analogue (Ge2 P2 )2- proved to be a suitable precursor for heteroatomic cluster synthesis. Over time in solution, it rearranges to form (Ge7 P2 )2- , as shown by NMR studies and X-ray diffraction. Reactions of (Ge2 P2 )2- with CdPh2 afford [K(crypt-222)]3 [Cd3 (Ge3 P)3 ], containing an unprecedented ternary cluster anion with a triangular Cd3 moiety.