Syntheses and Crystal Structures of [K(2.2.2-cryptand)](2)[(m-O){m-O(2)Si(CH(3))(2)}(2)(GeSe)(2)] and [K(2.2.2-cryptand)](2)[Sb(2)Se(6)].

[K(2.2.2-cryptand)]2[(μ-O){μ-O2Si(CH3)2}2(GeSe)2] (1) forms from the adventitious reaction of silicone grease with the residue (dissolved in CH3CN) from the reduction of GeSe2 by K in NH3(l) in the presence of 2.2.2-cryptand. Reduction of SbSe under similar conditions leads to the isolation of [K(2.2.2-cryptand)]2[Sb2Se6] (2).