The complex [(Ph3P) 2 (CO) 2 (S2N2) Ru~ l]+ AlC&-has been prepared by the reaction of (Ph3P) 2 (C0) 2RuC12 with S2N2. 2A1C13, and its structure is determined by single-crystal X-ray analysis. It crystallizes in the monoclinic space group Cc with a= 10.365 (1) A, b= 23.185 (5) A, c= 18.361 (3) A, fl= 106.06 (1) O, and Z= 4. The structure was refined to R= 0.041, R,= 0.038 for 3292 reflections with I 1 2.0 (a (Z)). In the cation the S2N2 is ...