[K4Pb9]∞2 – A low-dimensional arrangement of [Pb9]4− clusters in [K(18-crown-6)]2K2Pb9 · (en)1.5

Compound [K(18-crown-6)]2K2Pb9 (en)1.5 (1) was crystallized from the reaction mixture that resulted from adding of an ethylenediamine (en) solution of GeI2/K to an en solution of K4Pb9. The vice versa addition of an en solution of K4Pb9 to an en solution of GeI2/K only lead to the decomposition of the cluster. The single crystal X-ray structure determination shows that compound 1 contains a two-dimensional arrangement [K4Pb9]∞2 of lead Zintl ions. The layers, which have the same composition as the starting material Zintl-Phase K4Pb9, are separated by 18-crown-6 molecules.

Graphical abstractThe single crystal X-ray structure determination of [K(18-crown-)]2K2Pb9 · (en)1.5 shows that the title compound contains a two-dimensional arrangement of the composition [K4Pb9]. The layers are separated by 18-crown-6 molecules and have the same composition as the Zintl-Phase K4Pb9, which has been used as starting material.Figure optionsDownload full-size imageDownload as PowerPoint slide