The complexes Ag(L)(n)[WCA] (L=P₄S₃, P₄Se₃, As₄S₃, and As₄S₄; [WCA]=[Al(OR^F)(4)](-) and [F{Al(OR^F)(3)}(2)](-); R-F=C(CF3)(3); WCA=weakly coordinating anion) were tested for their performance as ligand-transfer reagents to transfer the poorly soluble nortricyclane cages P₄S₃, P₄Se₃, and As₄S₃ as well as realgar As₄S₄ to different transition-metal fragments. As₄S₄ and As₄S₃ with the poorest solubility did not yield complexes. However, the more soluble silver-coordinated P₄S₃ and P₄Se₃ cages were transferred to the electron-poor Fp(+) moiety ([CpFe(CO)(2)](+)). Thus, reaction of the silver salt in the presence of the ligand with Fp-Br yielded [Fp-P₄S₃][Al(OR^F)(4)] (1 a), [Fp-P₄S₃][F(Al(OR^F)(3))(2)] (1 b), and [Fp-P₄Se₃][Al(OR^F)(4)] (2). Reactions with P₄S₃ also yielded [FpPPh(3)-P₄S₃][Al(OR^F)(4)] (3), a complex with the more electron-rich monophosphine-substituted Fp(+) analogue [FpPPh(3)](+) ([CpFe(PPh3)(CO)](+)). All complex salts were characterized by single-crystal XRD, NMR, Raman, and IR spectroscopy. Interestingly, they show characteristic blueshifts of the vibrational modes of the cage, as well as structural contractions of the cages upon coordination to the Fp/FpPPh(3) moieties, which oppose the typically observed cage expansions that lead to redshifts in the spectra. Structure, bonding, and thermodynamics were investigated by DFT calculations, which support the observed cage contractions. Its reason is assigned to sigma and pi donation from the slightly P-P and P-E antibonding P₄E₃-cage HOMO (e symmetry) to the metal acceptor fragment.