Lead Carbodiimides Related to the Mineral Bideauxite

Solid state metathesis reactions of PbCl 2 with metal carbodiimides yielded multinary lead carbodiimide chlorides A Pb 2 Cl 3 (CN 2 ) ( A = Li, Na, Ag). Their crystal structures strongly relate to the mineral Bideauxite [AgPb 2 Cl 3 (OH,F) 2 ], all crystallizing in the space group Fd 3 m . The same crystal structure exists not only with chloride but also with bromide. Another compound obtained in this system is LiPbCl(CN 2 ) with a crystal structure that can be considered as the result of an intercalation of LiCl into the layered structure of Pb(CN 2 ).