Caesium 5-(2-cyanoethylthio)-2-thioxo-1,3-dithiole-4-thiolate

The crystal structure of the title compound, Cs + .C 6 H 4 NS 5 - , (I), shows that the Cs ion is eight-coordinated involving four thiolates, two neutral S atoms and two N atoms. The Cs...S distances are in the range 3.474(1)-3.810 (1) A, and the Cs…N distances are 3.317(5) and 3.389 (5) A. The three shortest Cs…S distances probably contribute substantially to the unusual stability of (I) in solution and as a solid thiolate stored without special precautions.