The title compound belongs to space group Cc with a 22.125(6), b 11.313(3), c 25.053(8) ? and b 118.05(2)? dc = 1.45 for Z = 4. The structure was refined to R = 0.073 and Rw = 0.069 for 1934 reflections. The structure contains Fe4S4 clusters with cubane-like configurations. Each Fe atom in the cluster is coordinated with 5 S atoms which are located on the vertexes of a distorted square pyramid. The atomic parameters are given.

Key words: CRYSTAL STRUCTURE DETERMINATION, TERTIARY AMINE, MOLECULAR STRUCTURE, X-RAY DIFFRACTION ANALYSIS, COMPUTER APPLICATIONS, IRON COMPLEX, NITROGENASE, CLUSTER COMPOUND, DIETHYLAMINE P, SULFIDE COMPLEX