Silicone grease as a precursor to a pseudo crown ether ligand: crystal structure of K+3K(Me2SiO)7+InH(CH2CMe3)3–4

The crystallization of KInH(CH2CMe3)3 from heptane in the presence of silicone grease led to the formation of the title compound, in which one potassium cation is surrounded by a planar cyclo-(Me2SiO)7 ligand; K+⋯ O distances range from 2.86(3) to 2.99(4)Å.