Synthesis and structure of [Na4(DMSO)15][(I3)3(I)]. Self-assembly of hexacoordinated sodium.

A new complex with the molecular formula [Na(4)(DMSO)(15)][(I(3))(3)(I)] represents the first example of Na(+) coordinated solely by DMSO. The triiodide (I(3)(-)) and iodide (I(-)) anions form an infinite linear chain running throughout the crystal.