Morais, Tânia S.Garcia, M. HelenaRobalo, Maria PaulaPiedade, M. F. M.Duarte, M. TeresaBrito, M. José Villa deMadeira, Paulo J. Amorim2015-09-082015-09-082012-08-15MORAIS, T. S.; [et al] – Synthesis and structural characterization of new Piano-stool Ruthenium(II) complexes bearing 1-Butylimidazole heteroaromatic ligand. Journal of Organometallic Chemistry. ISSN: 0022-328X. Vol. 713 (2012), pp. 112-1220022-328Xhttp://hdl.handle.net/10400.21/5126New cationic ruthenium(II) complexes with the formula [Ru(eta(5)-C5H5)(LL)(1-BuIm)] [Z], with (LL) = 2PPh(3) or DPPE, and Z = CF3SO3-, PF6-, BPh4-, have been synthesized and fully characterized. Spectroscopic and electrochemical studies revealed that the electronic properties of the coordinated 1-butylimidazole were clearly influenced by the nature of the phosphane coligands (LL) and also by the different counter ions. The solid state structures of the six complexes determined by X-ray crystallographic studies, confirmed the expected distorted three-legged piano stool structure. However the geometry of the 1-butylimidazole ligand was found considerably different in all six compounds, being governed by the stereochemistry of the mono and bidentate coligands (PPh3 or DPPE).engRuthenium(II)Cyclic voltametryX-ray crystal structuresMonocyclopentadienyl complexesButylimidazolejournal article10.1016/j.jorganchem.2012.04.024