Three cucurbit[5]uril-based heterometallic complexes

In the present study, we report three crystal structures of heterometallic Q[5]-based complexes. They are complexes of heterometallic cadmium and potassium ions/Q[5] capsules with a stoichiometry of {(CdCl)[K(H2O)][Cl@Q[5]]}+[CdCl3(H2O)2]−7H2O (1), heterometallic praseodymium and calcium/Q[5] pairs with a stoichiometry of 2{[Ca(H2O)(OH)]-μ-[Pr(H2O)3[Cl@Q[5]]]}3+6Cl−32H2O (2) and discrete heterometallic neodymium and potassium ions/Q[5] capsules with a stoichiometry of {[Nd(H2O)3][(NO3)@Q[5]][K(H2O)][Nd(H2O)3(NO3)4]}2+2(NO3)−8H2O (3).

► Three heterometallic metal ions/Q[5] systems are introduced.
► Introducing another inorganic salt will form a new novel Q[5]-based architecture.
► The ionic radiuses of the related metal also influence the coordination.