The complexes [CpRu(CO)2{(CH2)nX}] (n = 3, X = a, Br, I; n = 4, 5, X = Br, I; Cp = eta5-C5H5) have been prepared and fully characterised by elemental analyses, IR, H-1 NMR, C-13 NMR and mass spectroscopy. Some properties of these new compounds are discussed.