[Pb2I3(18-crown-6)(2)][SnI5] and CdI2(18-crown-6)center dot 2I(2): Two Layered Iodine Networks with Crown-ether Coordinated Pb2+ and Cd2+

[Pb2I3(18-crown-6)(2)][SnI5] (1) and CdI2(18-crown-6)center dot 2I(2) (2) were prepared by reaction of PbI2, SnI4 and 18-crown-6 as well as CdI2, I-2 and 18-crown-6. All reactions were performed in the ionic liquid [NMe(nBu)(3)][N(Tf)(2)], which serves as polar but aprotic liquid-phase providing a fast diffusion of the reactants at moderate temperatures (<= 100 degrees C). 1 exhibits V-shaped [Pb2I3(18-crown-6)(2)](+) cations and trigonal-bipyramidal [Snl5](-) anions. In CdI2(18-crown-6)center dot 2I(2) (2), the building unit CdI2(18-crown-6) formally contains linear CdI2 molecules that are interlinked by molecular iodine via long-ranging I-I contacts.