Synthesis, characterization and molecular structure of Ru(II) complex with 8-hydroxyquinoline derivative

The new (E)-8-hydroxyquinoline-2-carbaldehyde O-benzyl oxime ligand and its hydride–carbonyl complex of ruthenium was synthesized and characterized by infrared, proton and phosphorus nuclear magnetic resonance, electronic absorption and emission spectroscopy and X-ray crystallography. The experimental studies were complemented by theoretical calculations. From the electronic spectrum of the complex the Racah’s and nepheloauxetic parameters are calculated. The electronic structure of the complexes, presented in particular by the density of states diagram, have been correlated with its ability to fluoresce and used to analyze the UV–Vis spectra.

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