The heterocyclic-dithiocarboxylato complexes CpRu(PPh3)(kappa S-2, S-S2C-het) [het= 2-C4H3O (1), 2-C4H3S (2), 1-C4H8N (3)] are obtained by the reaction of the ruthenium chloride, CpRu(PPh3)(2)Cl, with the anions, het-CS2-. The X-ray structure of CpRu(PPh3)(kappa S-2, S-S2C-1-C4H8N) (3) is determined by single crystal X-ray diffraction.