Zusammenfassung

The crystal structures of [Na([2.2.2]crypt)]2Na2[(η4-Pb4)Mo(CO)3] · 8.7NH3 and Na6[Pb4{Mo(CO)3}3] · 22NH3 are reported. They contain the novel transition metal-functionalized Zintl ions [(η4-Pb4)Mo(CO)3]4− and [Pb4{Mo(CO)3}3]6− that can be related to previously reported lead clusters via the isolobal principle. Nudged elastic band calculations are employed to propose a possible formation mechanism for [(η4-Pb4)Mo(CO)3]4−.