Cationic half-sandwich complexes (Rh, Ir, Ru) containing 2-substituted-1,8-naphthyridine chelating ligands: Syntheses, X-ray structure analyses and spectroscopic studies

摘要

Reactions of the dinuclear complexes [(η-arene)Ru(-Cl)Cl] (arene = CH, PrCHMe) and [(η-CMe)M(μ-Cl)Cl] (M = Rh, Ir) with 2-substituted-1,8-naphthyridine ligands, 2-(2-pyridyl)-1,8-naphthyridine (pyNp), 2-(2-thiazolyl)-1,8-naphthyridine (tzNp) and 2-(2-furyl)-1,8-naphthyridine (fuNp), lead to the formation of the mononuclear cationic complexes [(η-CH)Ru(L)Cl]+ {L = pyNp (); tzNp (); fuNp ()}, [(η-PrCHMe)Ru(L)Cl] {L = pyNp (); tzNp (); fuNp ()}, [(5-CMe)Rh(L)Cl]+ {L = pyNp (); tzNp (); fuNp ()} and [(η-CMe)Ir(L)Cl] {L = pyNp (); tzNp (); fuNp ()}. All these complexes are isolated as chloro or hexafluorophosphate salts and characterized by IR, NMR, mass spectrometry and UV/Vis spectroscopy. The molecular structures of []Cl, []PF, []PF, []PF and []PF have been established by single crystal X-ray structure analysis.