Synthesis and electrochemical studies of η5-monocyclopentadienylruthenium(II) complexes with substituted thiophene nitrile ligands. Crystal structure of [Ru(η5-C5H5)(dppe)(NC{SC4H2}2NO2)][PF6]

New organometallic complexes [Ru(η5-C5H5)(P_P)(NC{SC4H2}nNO2)][PF6] (P_P = dppe, (+)-diop; n = 1-3) were prepared and fully characterized. Spectroscopic, electrochemical and crystallographic data were used in order to get an insight on the first hyperpolarizabilities of these complexes when compared to those found in parent compounds reported in the literature.